Question

By selling an article for Rs. 900; a man gains 20%. Find his cost price

Answer 1

Profit % $=\frac{S.P.-C.P.}{C.P}\times 100$

$=>\frac{900-C.P.}{C.P}\times 100=20$

$\Rightarrow 20C.P.=90000-100C.P.$
$\Rightarrow 120C.P.=90000$
$\Rightarrow C.P.=$ Rs. $750$