Question

By selling the bicycle of 1200rs. Rohit gets a profit of 20%.Find the cost price of the bicycle

Answer 1

$we \: knw \: that \\ (profit \: or \: loss) = \frac{sp - cp}{cp} \times 100 \\ \\ here \: profit \: = 20\% \\ sp = 1200 \\ \\ 20 = \frac{1200 - cp}{cp} \times 100 \\ \frac{20cp}{100} = 1200 - cp \\ \frac{2cp}{10} + cp = 1200 \\ \frac{12cp}{10} = 1200 \\ cp = \frac{1200 \times 10}{12} \\ cp = 1000$
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