Question

at what percent per annum will ₹1620 amounts to ₹1962 in 3 yrs 2 months.

Answer 1

Principle = rs 1620
Amount = rs 1962
So, S.I = amount - principle
= 1962 - 1620
= 342
Time = 3 yrs 2 months
= 2 months
= 2/12 yrs
= 1/6 yrs
So! Total time = 3 1/6 yrs = 19/6 yrs
Rate of interest per annum = S.I x 100 /P x T
= 342 x 100 x 6/ 1620 x 19
= 20/3 %

Hope it helps...!!!