Question

On what sum of money does the difference between simple interest and compound interest in 2 years at 5% per annum is 15 rupees?​

Answer 1

Answer: the answer is 1200 rupees .

Step-by-step explanation:

Let the principal be 100

Therefore Si for 2 years will be =p×r×t/100

=10 rupees

And compound interest would be ci=p (1+r/100)^2

=11.25 rupees .

Difference between then =11.25-10 = 1.25 rupees

But the given difference between the original compound interest and simple interest is 15 rupees

Therefore at 100 rupees principal the difference is 1.25 rupees .and at how much principal will the differnce be 15 ruppees .

By cross multiplication we get 1200 rupees .

HOPE IT HELPS......