Question

in what time will the simple interest be 2/5 of the principal at 8 per annum?​

Answer 1

Let the principal be x

rate=8 p.a.

simple interest =2x/5

si=p*r*t/100

2x/5=x*8*t/100

2x=8xt/20

40x=8xt

dividing by x

40=8t

t=40/8

t=5years

comment if u have any doubt and dont forget my brainly

Answer 2

Answer:

let the principal be x

rate-8p.a

si -prt/100

2×/5=×8+/100

2×=8×t/20

40×/80×t

divied by×

40=8t

t=40/80

t=5year