Question

Simple Interest on a sum of money at the end of 4 years is ⅘ of the Sum itself. Find the rate per cent per annum.

Answer 1

Answer:

rate on sum is 20% per anum

Step-by-step explanation:

we have a formula for simple interest is

S.I=P×R×N/100

as ,

interest = (4/5)×principal (sum amount)

P×4/5=P×R×4/100

simplifying,

4×100=R×4×5

R=100/5

R= 200

so, rate on sum is 20% per anum