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

50
75
No change
None of these

Correct Answer: No change

Explanation:

Let length = l and breadth = b
Then, area = lb
New length = 2l
And new breadth = b/2
∴ New area = ( 2l ) x (b/2) = lb
So, there is no change in area .

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