Question

5. Simple interest on a certain sum is9/16 is of the principal. Find the rate of interest and time if both
are equal.
(Vikram 2009)
(Ans. : 7*1/2%; 7* 1/2years)​

Answer 1

Answer:

let principle x

intrest 9x/16

let time and rate of intrest y

I=PTR/100

9x/16=x*y*y/100

9/16=y²/100

y²=900/16

y=30/4

y=7½%

time and rate of intrest 7½