Question

The interest on a sum of money at the end of 2`1/2` years is `4/5` of the sum. What is the rate per cent?

Answer 1

T = `2 1/2` years

= `5/2` years

S.I. = `4/5` P

R = `("S"."I" xx 100)/("P" xx "T")`

= `(4"P" xx 100 xx 2)/(5 xx "P" xx 5)`

= 32%