Question

Simple interest on a certain sum is 9/16 of the sum. Find the rate per cent and the time if both are numerically equal

Answer 1

Step-by-step explanation:

Let the sum=x

Then Simple interest = 9/16 x

let the rate = R % and time = R years

S.I. = P × T × R

100

=) x × R × R. = 9 x

100. 16

=) R² = 9

100. 16

=) R² = 900

16

=) R = 30 = 15 = 7½

4. 2

Hence rate of interest is 7½ %. and the time is 7½