Question

what sum will amount to rs 4590 at 12%p.a. in 3 years​

Answer 1

Given amount= Rs 4590

           rate of interest = 12%

           time = 3 years

Let principle = P Rs

S.I = P*T*R/100

S.I = P*3*12/100

S.I = 36 P/100

amount = principle + interest

4590 = P + 36 P/100

4590 = 136 P/100

P = 4590*100/136 = Rs 3375

Sum (principle) = Rs 3375

Answer 2

By simple interest. = ₹13,770

And

By compound interest = ₹1858.61