- Principal amount (P) = Rs. 6250

- Amount (A) = Rs. 7290

- Time (t) = 2 years



The formula used to calculate compound interest is:

A = P(1 + r/100)^t

Where,

A = Amount

P = Principal amount

r = Rate of interest

t = Time period



Substituting the given values in the above formula, we get:

7290 = 6250(1 + r/100)^2

Taking square root on both sides, we get:

√(7290/6250) = 1 + r/100

r/100 = √(7290/6250) - 1

r/100 = 0.08

r = 8%

Therefore, the rate of interest per annum is 8%.


- The question is about finding the rate of interest per annum at which a sum of Rs. 6250 will amount to Rs. 7290 in 2 years.

- The formula used to calculate compound interest is A = P(1 + r/100)^t, where A is the amount, P is the principal amount, r is the rate of interest per annum, and t is the time period.

- Substituting the given values in the formula, we get an equation in terms of the rate of interest.

- Solving the equation, we get the rate of interest per annum as 8%.

- Therefore, the answer to the question is that the rate of interest per annum is 8%.