Arithmetic Ability
Area

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Q.

The length of a rectangle is halved, while its breadth is tripled. What is the percentage change in area?

View Answer

Correct choice: D

Explanation:

Let original length = x and original breadth = y. Original area = xy. New length = x/2 and New breadth=3y New area = 32xy Therefore, Increase in area = New area-original area = 32xy−xy=12xy Therefore, Increase % = increase in area original area*100=(12xyxy/)*100=50 %
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