Question

Simple interest on a certain sum is 9/25 of the sum. Fund the rate of interest and time if both are numerically equal​

Answer 1

Answer:

Step-by-step explanation:

let P be the principal or sum, R be the rate of interest and T be the time. R & T are numerically same.

The interest component is nothing but (rate*time*principal amount)/100 which is again equal to 9/25th of P-the sum.

Therefore, 9/25P = PRT/100

or, 9*100/25 = R sqr (as R=T)

or R = root over (9*100/25)

or R = 6%

Answer 2

Answer:

Step-by-step explanation:

let P be the principal or sum, R be the rate of interest and T be the time. R & T are numerically same.

The interest component is nothing but (rate*time*principal amount)/100 which is again equal to 9/25th of P-the sum.

Therefore, 9/25P = PRT/100

or, 9*100/25 = R sqr (as R=T)

or R = root over (9*100/25)

or R = 6%