Question

if the rate of interest of 8% per annum earns an interest of two-fifth of the principal, find the time period​

Answer 1

Here's your answer mate

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Answer 2

Given,

The rate of interest of $8$% per annum earns an interest of two-fifth of the principal,

Here, $P$ be the principal amount

According to the question,

An interest of two-fifth of the principle $= \frac{2}{5}P$

Formula,

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

Substitute the above values in the formula, we get

$\frac{2}{5}P=\frac{P\times 8\times T}{100}$

$\frac{2\times100}{8\times5}=T$

$T=5$

Therefore, the time period is $5$ years.