Rs Aggarwal 2018 Solutions for Class 7 Math Chapter 12 Simple Interest are provided here with simple step-by-step explanations. These solutions for Simple Interest are extremely popular among Class 7 students for Math Simple Interest Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rs Aggarwal 2018 Book of Class 7 Math Chapter 12 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Rs Aggarwal 2018 Solutions. All Rs Aggarwal 2018 Solutions for class Class 7 Math are prepared by experts and are 100% accurate.
Page No 165:
Question 1:
Find the simple interest and the amount when:
Principal = Rs 6400, rate = 6% p.a. and time = 2 years
Answer:
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Question 2:
Find the simple interest and the amount when:
Principal = Rs 2650, rate = 8% p.a. and time = years
Answer:
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Question 3:
Find the simple interest and the amount when:
Principal = Rs 1500, rate = 12% p.a. and time = 3 years 3 months.
Answer:
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Question 4:
Find the simple interest and the amount when:
Principal = Rs 9600, rate = p.a. and time = 5 months.
Answer:
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Question 5:
Find the simple interest and the amount when:
Principal = Rs 5000, rate = 9% p.a. and time = 146 days.
Answer:
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Question 6:
Find the time when:
Principal = Rs 6400, SI = Rs 1152 and rate = 6% p.a.
Answer:
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Question 7:
Find the time when:
Principal = Rs 9540, SI = Rs 1908 and rate = 8% p.a.
Answer:
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Question 8:
Find the time when:
Principal = Rs 5000, amount = Rs 6450 and rate = 12% p.a.
Answer:
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Question 9:
Find the rate when:
Principal = Rs 8250, SI = Rs 1100 and time = 2 years.
Answer:
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Question 10:
Find the rate when:
Principal = Rs 5200, SI = Rs 975 and time = years.
Answer:
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Question 11:
Find the rate when:
Principal = Rs 3560, amount = Rs 4521.20 and time = 3 years.
Answer:
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Question 12:
Shanta borrowed Rs 6000 from the State Bank of India for 3 years 8 months at 12% per annum. What amount will clear off her debt?
Answer:
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Question 13:
Hari borrowed Rs 12600 from a moneylender at 15% per annum simple interest. After 3 years, he paid Rs 7070 and gave a goat to clear off the debt. What is the cost of the goat?
Answer:
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Question 14:
The simple interest on a certain sum for 3 years at 10% per annum is Rs 829.50. Find the sum.
Answer:
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Question 15:
A sum when reckoned at per annum amounts to Rs 3920 in 3 years. Find the sum
Answer:
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Question 16:
A sum of money put at 11% per annum amounts to Rs 4491 in 2 years 3 months. What will it amount to in 3 years at the same rate?
Answer:
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Question 17:
A sum of money invested at 8% per annum amounts to Rs 12122 in 2 years. What will it amount to in 2 years 8 months at 9% per annum?
Answer:
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Question 18:
At what rate per cent per annum will Rs 3600 amount to Rs 4734 in years?
Answer:
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Question 19:
If Rs 640 amounts to Rs 768 in 2 years 6 months, what will Rs 850 amount to in 3 years at the same rate per cent per annum?
Answer:
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Question 20:
In what time will Rs 5600 amount to Rs 6720 at 8% per annum?
Answer:
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Question 21:
A sum of money becomes of itself in 5 years at a certain rate of simple interest. Find the rate of interest.
Answer:
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Question 22:
A sum of money lent at simple interest amounts to Rs 783 in 2 years and to Rs 837 in 3 years. Find the sum and the rate per cent per annum.
Answer:
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Question 23:
A sum of money lent at simple interest amount to Rs 4745 in 3 years and to Rs 5475 in 5 years. Find the sum and the rate per cent per annum.
Answer:
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Question 24:
Divide Rs 3000 into two parts such that the simple interest on the first part for 4 years at 8% per annum is equal to the simple interest on the second part for 2 years at 9% per annum.
Answer:
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Question 25:
Divide Rs 3600 into two parts such that if one part be lent at 9% per annum and the other at 10% per annum, the total annum income is Rs 333.
Answer:
Page No 166:
Question 1:
Mark (✓) against the correct answer
The simple interest on Rs 6250 at 4% per annum for 6 months is
(a) Rs 125
(b) Rs 150
(c) Rs 175
(d) Rs 135
Answer:
Page No 166:
Question 2:
Mark (✓) against the correct answer
A sum amounts to Rs 3605 in 219 days at 5% per annum. The sum is
(a) Rs 3250
(b) Rs 3500
(c) Rs 3400
(d) Rs 3550
Answer:
(b) Rs.3500
Page No 166:
Question 3:
Mark (✓) against the correct answer
At simple interest a sum becomes of itself in years. The rate of interest per annum is
(a) 6%
(b)
(c) 8%
(d) 9%
Answer:
(c) 8%
Page No 167:
Question 4:
Mark (✓) against the correct answer
In what time will Rs 8000 amount to Rs 8360 at 6% per annum simple interest?
(a) 8 months
(b) 9 months
(c) years
(d) years
Answer:
(b) 9 months
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Question 5:
Mark (✓) against the correct answer
At what rate per cent annum simple interest will a sum double itself in 10 years?
(a) 8%
(b) 10%
(c) 12%
(d)
Answer:
(b) 10%
Page No 167:
Question 6:
Mark (✓) against the correct answer
The simple interest at x% per annum for x years will be Rs x on a sum of
(a) Rs x
(b) Rs 100x
(c)
(d)
Answer:
(c) Rs.
Page No 167:
Question 7:
Mark (✓) against the correct answer
The simple interest on a sum for 5 years is of the sum. The rate per cent per annum is
(a) 10%
(b) 8%
(c) 6%
(d)
Answer:
(b) 8%
Page No 167:
Question 8:
Mark (✓) against the correct answer
A borrows Rs 8000 at 12% per annum simple interest and B borrows Rs 9100 at 10% per annum simple interest. In how many years will their amounts be equal?
(a) 18 years
(b) 20 years
(c) 22 years
(d) 24 years
Answer:
(c) 22 years
Page No 167:
Question 9:
Mark (✓) against the correct answer
A sum of Rs 600 amounts of Rs 720 in 4 years. What will it amount to if the rate of interest is increased by 2%?
(a) Rs 724
(b) Rs 648
(c) Rs 768
(d) Rs 792
Answer:
(c) Rs. 768
Page No 167:
Question 10:
Mark (✓) against the correct answer
x, y and z are three sums of money such that y is the simple interest on x and z is the simple interest on y for the same time and same rate. Which of the following is correct?
(a) xyz = 1
(b) z2 = xy
(c) x2 = yz
(d) y2 = zx
Answer:
(d) y2 = zx
Page No 167:
Question 11:
Mark (✓) against the correct answer
In how much time would the simple interest on a certain sum be 0.125 times the principal at 10% per annum?
(a) years
(b) years
(c) years
(d) years
Answer:
(a)
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Question 12:
Mark (✓) against the correct answer
At which sum will the simple interest at the rate of per annum be Rs 210 in years?
(a) Rs 1580
(b) Rs 2400
(c) Rs 2800
(d) none of these
Answer:
(b) Rs 2400
Page No 168:
Question 1:
Find the simple interest on Rs 6300 at 8% per annum for 8 months.
Answer:
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Question 2:
What sum will amount to Rs 6600 in 2 years at 10% per annum simple interest?
Answer:
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Question 3:
At what rate per cent per annum simple interest will Rs 3625 amount to Rs 4495 in 2 years?
Answer:
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Question 4:
In what time will Rs 3600 amount to Rs 4410 at 9% per annum simple interest?
Answer:
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Question 5:
At what rate per cent per annum simple interest will a sum double itself in 12 years?
Answer:
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Question 6:
A sum of money becomes of itself in 6 years at a certain rate of simple interest. Find the rate of interest.
Answer:
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Question 7:
Mark (✓) against the correct answer
At simple interest a sum becomes of itself in years. The rate of interest per annum is
(a) 7%
(b) 8%
(c) 9%
(d) 12%
Answer:
(c) 9%
Page No 168:
Question 8:
Mark (✓) against the correct answer
A sum amounts to Rs 3626 in 219 days at 6% per annum simple interest. The sum is
(a) Rs 3000
(b) Rs 3200
(c) Rs 3500
(d) Rs 3600
Answer:
(c) 3500
Page No 168:
Question 9:
Mark (✓) against the correct answer
In what time will Rs 6000 amount to Rs 6360 at 8% per annum simple interest?
(a) 9 months
(b) 8 months
(c) years
(d) years
Answer:
(a) 9 months
Page No 168:
Question 10:
Mark (✓) against the correct answer
The simple interest on a sum for 5 yars is of the sum. The rate per cent per annum is
(a) 8%
(b) 10%
(c) 12%
(d)
Answer:
Page No 168:
Question 11:
Mark (✓) against the correct answer
The simple interest at x% per annum for x years will be Rs x on a sum of
(a) Rs x
(b) Rs 10 x
(c) Rs 100 x
(d) Rs
Answer:
Page No 168:
Question 12:
Mark (✓) against the correct answer
At what rate per cent per annum simple interest will a sum double itself in 10 years?
(a) 8%
(b) 10%
(c) 12%
(d)
Answer:
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Question 13:
Fill in the blanks.
(i)
(ii)
(iii) At (......)% per annum simple interest a sum doubles itself in 10 years.
(iv) At simple interest a sum becomes of itself in years. The rate of interest is (......)% per annum.
Answer:
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Question 14:
Write 'T' for true and 'F' for false
(i) Simple interest on Rs x for x years is Rs x. Then, the rate of interest is x% per annum.
(ii) Rate = .
(iii) A sum doubles itself at simple interest at 10% per annum in 10 years.
(iv) Simple interest on Rs 1000 at 5% per annum for 73 days is Rs 10.
Answer:
View NCERT Solutions for all chapters of Class 7