At what rate percent per annum will Rs 1620 amount to Rs 1962 in 3 years 2 months - Maths - Life Mathematics

Question

At what rate percent per annum will Rs 1620 amount to Rs 1962 in 3
years 2 months?

Varun.Rawat · Accepted Answer

Let R % p a
 be the rate of interest
Now, Principal, P = Rs 1620Amount, A = Rs 1962Time, T = 3 yr 2 months = 3212 yrs = 316 yrs = 196 yrsNow, SI = PRT100⇒A - P = PRT100⇒1962 - 1620 = 1620 × R × 196×100⇒342 = 1620 × R × 196×100⇒18 = 1620 × R 6×100⇒R = 18 × 6001620⇒R = 6
67So, rate is 6 67% p a

At what rate percent per annum will Rs 1620 amount to Rs 1962 in 3 years 2 months?