Question

In 4 years the simple interest on certain sum of money is 9/
25of the principal. Find therate of interest.

Answer 1

Answer:

let principal amount is Rs x

interest= Rs 9x/25

rate of interest

=9x.100/4.25.x

=9

rate of interest =9%

Answer 2

Given,

In $4$ years the simple interest on certain sum of money is $\frac{9}{25}$ of the principal

We have to find the rate of interest

According to the given condition,

Time period $=4$ years

Let, Principal be $p$

Simple interest be $\frac{9}{25}\times p$

Formula,

Simple interest $= \frac{PTR}{100}$

Substitute all the values, we get

$\frac{9}{25}\times p= \frac{p\times R \times 4}{100}$

$\frac{9}{25}= \frac{R4}{100}$

$R= \frac{9\times25}{25}$

$R= 9$

Therefore, the answer is $9$%.