Question

If a man sell a pen in 21 ruppes and get 5% profit .Then find the cost price of pen?

Answer 1

Answer : $\bold{Cost \: Price \: is \: Rs \: 20}$

$\bold{Explanation :}$

Given :

Selling price = Rs 21

Profit Percentage = 5 %


Finding Cost Price -

Formula of Cost Price = (100/100+profit) x SP


$cost \: price \: = \dfrac{100}{100 + 5} \times 21$

$cost \: \: price = \dfrac{100}{105} \times 21$

$cost \: \: price = 20$

Hence :

$\bold{Cost \: price \: = \: Rs \: 20}$

Answer 2

cp of pen=21*100÷105