Question

The price of the book is marked 20% above the C.P. If the marked price of the book is Rs. 180, then what is the cost of the paper used in a single copy of the book?

• A. Rs. 36
• B. Rs. 37.50
• C. Rs. 42
• D. Rs. 44.25

Answer 1

The correct option is B Rs. 37.50

Clearly, marked price of the book = 120% of C.P.
Also, cost of paper = 25% of C.P
Let the cost of paper for a single book be Rs. n.
Then, 120:25=180:n$\Rightarrow n=Rs.\left(\frac{25\times 180}{120}\right)=Rs.37.50$