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Question

A boy has enough money to buy 20 books. If each book costs 25 paise less, he could buy two more books and still have 70 paise left. The money boy has is?

A
Rs. 16
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B
Rs. 24
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C
Rs. 48
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D
Rs. 36
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Solution

Let the original cost of each book =Rs. x It is given that, money has enough to buy 20 books.⇒ Total money near the boy =Rs. 20xIt is given that, If each book costs 25 paise less,then will buy two more books and still have 70 paise left.⇒20×x=22(x−0.25)+0.70⇒20x=22x−5.5+0.70⇒20x−22x=−4.8 ⇒−2x=−4.8⇒x=2.4Therefore, Original cost of each book =Rs. 2.40.⇒ Money with the boy =20×Rs. 2.40=Rs. 48Hence, Option C. is correct.

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