1. 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?





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  • By: guest on 01 Jun 2017 11.13 pm
    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         n = Rs. 25 x 180 = Rs. 37.50 . 120
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