A manufacturer has 600 L of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that the acid content in the resulting mixture will be more than 15% but less than 18%?

a polygon has 44 diagonals.find the no. of its sides.

an object dropped from cliff falls with a constant acceleration of 10m/s2 find its speed after 2s after it was dropprd

Q. Solve graphically:- 3y-2x<4, x+3y>3, x+y<equals 5.

in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.

if ^{22}P_{r}+1^{:20p}_{r}+2 = 11:52 find r

15x less than 73, where (i)x belongs to N and (ii) Z.

solve the inequation and represent the solution set on the number line.

a scooter covers 20km/h at a uniform speed of 30km/h what should be its speed for the next 40 km if the average speed is 60km/h

if log_{0.3}(x-1) < log_{0.09}(x-1), then x lies in the interval....

Find all pairs of consecutive even positive integers, both of which are larger than 5 such that their sum is less than 23.

if ^{n-1}c_{r}:^{n}c_{r}:^{n+1}c_{r}=6:9:13 find n and r

an object moves along a straight line with an acceleration of 2m/s2 if its initial speed is 10m/s what will be its speed 5s later

how to solve:

log_{2} [ x-5 /2x-3 }^{2} <0

if all permutations of the letters of the word INDIA are arranged as in a dictionary what is the 60^{th} word?

how to solve modulus (2x - 1/x - 1)>2?

A plumber can be paid under 2 schemes as given below:-

I : $600 and $ 50 per hour.

II: $ 170 per hour .

If the job takes n hours, what values of n does Scheme I give the plumber better wages?

While drilling a hole in the earth, it was found that the temperature (TC) at x km below the surface of the earth was given by

T = 30 + 25(x - 3), when 3 ≤ x ≤ 15.

Between which depths will the temperature be between 200C and 300C?

a milk of 80% conc. is diluted at home by the seller by adding some water to it so that milk conc. is reduced btw 65% to 70% . if 640 l of milk of 80% conc. is available how much water has been added??

Solve the following system of inequalities graphically

2x +y ≤ 24 ,

x +y ≤ 11 ,

2x + 5y ≤ 40 ,

x ≥0 , y ≥ 0

A manufacturer has 600 L of a 12% solution of acid. How many litres of a 30% acid solution must be added to it so that the acid content in the resulting mixture will be more than 15% but less than 18%?

➩ mod (x) - 1 ÷ mod (x) - 2 is greater than or equal to 0.

{Please explain the whole sum in detail}

Sir, these types of sums are not in our ncert booklet. But I found the same in RD sharma. So, tell me that whether it is right to concentrate in this type of sums or not.

a polygon has 44 diagonals.find the no. of its sides.

an object dropped from cliff falls with a constant acceleration of 10m/s2 find its speed after 2s after it was dropprd

Q. Solve graphically:- 3y-2x<4, x+3y>3, x+y<equals 5.

in how many ways can the letters of the word FRACTION be arranged so that no two vowels are together.

if

^{22}P_{r}+1^{:20p}_{r}+2 = 11:52 find r15x less than 73, where (i)x belongs to N and (ii) Z.

solve the inequation and represent the solution set on the number line.

a scooter covers 20km/h at a uniform speed of 30km/h what should be its speed for the next 40 km if the average speed is 60km/h

if log

_{0.3}(x-1) < log_{0.09}(x-1), then x lies in the interval....Find all pairs of consecutive even positive integers, both of which are larger than 5 such that their sum is less than 23.

➩ mod(x - 2) is greater then or equal to 5.

How to do the last step, please explain sir.

if

^{n-1}c_{r}:^{n}c_{r}:^{n+1}c_{r}=6:9:13 find n and ran object moves along a straight line with an acceleration of 2m/s2 if its initial speed is 10m/s what will be its speed 5s later

how to solve:

log

_{2}[ x-5 /2x-3 }^{2}<0if all permutations of the letters of the word INDIA are arranged as in a dictionary what is the 60

^{th}word?how to solve modulus (2x - 1/x - 1)>2?

^{2}A plumber can be paid under 2 schemes as given below:-

I : $600 and $ 50 per hour.

II: $ 170 per hour .

If the job takes n hours, what values of n does Scheme I give the plumber better wages?

While drilling a hole in the earth, it was found that the temperature (TC) at x km below the surface of the earth was given by

T = 30 + 25(x - 3), when 3 ≤ x ≤ 15.

Between which depths will the temperature be between 200C and 300C?

a milk of 80% conc. is diluted at home by the seller by adding some water to it so that milk conc. is reduced btw 65% to 70% . if 640 l of milk of 80% conc. is available how much water has been added??

Solve the following system of inequalities graphically

2x +y ≤ 24 ,

x +y ≤ 11 ,

2x + 5y ≤ 40 ,

x ≥0 , y ≥ 0