Question

A sum of money amount to rs 51920 in 2 years and to Rs 59840 in 4 years at a certain rate of simple interest find the sum and the rate​

Answer 1

Here :-

51920 = {P×R×2/100}+P. -(1)

59840= {P×R×4/100}+P. -(2)

Subtract (1) from (2)

59840 - 51920 = P×R×2/100

7920 =P×R×2/100

792000=P×R×2

792000/2=P×R

396000=P×R

On putting(1) , we get,

51920 = {396000×2/100}+p

5192000=792000+p

5192000-792000=p

4400000=p