Question

the simple interest of 4 years of a sum is 1/5 of its principal the rate of interest is​

Answer 1

Answer:

Let principal amount = P

Simple interest = P/5

Time = 4 yrs

Rate = R

As, Simple Interest = P × R/100 × Time

P/5 = P × R/100 × 4

R/100 = P / 20P

R = 100 /20

R = 5%

Hence rate of interest is 5% Per annum