Question

At what rate of interest per annum, the simple interest on a certain sum becomes2/5 times of amount in 10 years at simple interest?​

Answer 1

Let the principle amount is P and rate of interest is r%

So, simple interest for 1 year = P * r/100

Interest for 10 years = 10Pr/100 = Pr/10

As per given condition, Interest for 10 years = 2/5 of the principle amount

So, Pr/10 = (2/5) * P

Or, r = 10 * (2/5) * P/P = 4% Ans

I hope my answer is helpful to you

plzzzzzzzzz

Mark as brainlist