Question

a sum of money becomes 8/5 of itself in 5 years at a certain rate of simple interest . find the rate of interest.

Answer 1

let the money be x it become 8/5 ie 8/5x Amount =8/5x

Principal =x

a-p=si

8/5x-x=3/5x

3/5x=x*r*5/100

r=12%

Answer 2

$\huge{\underline{\underline{\mathfrak{\pink{Answer:}}}}}$

Refer to the attachment!