Question

simple interest on a certain sum is 9 by 16 of the sum find the rate percent and the time if both are memorylicaly equal​

Answer 1

Answer:

let the sum be x

then S.I= 9x/16

let rate percent be r and time be t

t=r

si= x*r*r/100

9x/16= x*R2/100

R2= 9x*100/16*x

R2= 9*25/4

R= √9*25/4

R= 3*5/2

R= 15/2

therefore

rate percent= 7.5%

time taken =

$7 \frac{1}{2} \: years$