Multiple choice

A man buys two books for a total cost of rs.450. By selling one for 4/5 of its cost and the other for 5/4 of its cost, he makes a profit of 45 Rs. on overall transaction. The cost of the lower price book is-

  1. 150

  2. 250

  3. 120

  4. 300

  5. 700
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Let cheaper book cost x. Then: 4x/5 + 5(450-x)/4 = 450 + 45 = 495. Solving: 16x + 25(450-x) = 9900, giving x = 150. The lower-priced book costs Rs. 150.

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