Question

simple interest on sum of money at the end of 5year is 4/5 of the sum itself. find the rate per cent p. a ​

Answer 1

Step-by-step explanation:

let the sum be x then,

P = x

S.I. = 4x/5

t = 5 years

S.I. = (P × R × T) / 100

4x/5 = (x × R × 5) / 100

4x/5 × 100 = R × 5x

160x = R × 5x

160x/5x = R

32 % = R

R = 32%