Question

A supplier supplies cartridges to a news paper publishing house. He earns a profit of 25% by selling cartridges for Rs. 1540. Find the cost price of the Cartridges ?

Answer 1

Let Cost Price(C.P) $=P$
gain$\%=\frac{(S.P-C.P)}{C.P}\times 100$
$\Rightarrow 25=\frac{(1540-P)}{P}\times 100$
$\Rightarrow \frac{25}{100}=\frac{(1540-P)}{P}$
$\Rightarrow P=4\left(1540\right)-4P$
$\Rightarrow 5P=4\left(1540\right)$
$\Rightarrow P=1232$
So, Cost Price $=$ Rs.$1232$