Question

By selling a book for $Rs.360,20\%$ profit was earned. What is the $CP$ of the book?

• A. $Rs.300$
• B. $Rs.200$
• C. $Rs.250$
• D. $cannotbedetermined$

Answer 1

Answer: (A)

$Rs.300$

We know that,

$SP=CP+Profit$

$Profit=x\%\times CP=\frac{x}{100}\times CP$,where $x$ is the percent of profit

So, given $SP=360$

$Profit=20\%$

Using above equation:-

$360=CP+\frac{20}{100}\times CP$

$360=CP+\frac{CP}{5}$

$CP=\frac{360\times 5}{6}=300$

Therefore, $CP=300$