At what rate percent per annum will a sum of rupees 12000 yield to rupees 189 1 50 as compound - Maths -

Question

At what rate percent per annum will a sum of rupees 12000 yield to
rupees 189 1 50 as compound interest in 3 years
please give the correct answer to the question because reference is
not helping to get the correct answer

Varun.Rawat · Accepted Answer

Let R %  be the rate of interestper annum
Now, Principal, P = Rs 12000Compound Interest, CI = Rs 1891
50Now, time, n = 3 yrsNow, Amount, A = P1 + R100n⇒CI + P = P1 + R100n⇒CI = P1 + R100n - P⇒CI = P1 + R1003 - 1⇒1891
50 = 120001 + R1003 - 1⇒1891
5012000 = 1 + R1003 - 1⇒1891
5012000 + 1 = 1 + R1003 ⇒13891
5012000 = 1 + R1003 ⇒138915120000 = 1 + R1003 ⇒92618000 = 1 + R1003 ⇒21203 = 1 + R1003 ⇒1 + R100 = 2120⇒R100 = 120⇒R = 5So, rate of interest = 5% p
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At what rate percent per annum will a sum of rupees 12000 yield to rupees 189 1.50 as compound interest in 3 years please give the correct answer to the question because reference is not helping to get the correct answer

At what rate percent per annum will a sum of rupees 12000 yield to rupees 189 1.50 as compound interest in 3 years
please give the correct answer to the question because reference is not helping to get the correct answer