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in Mathematics by (106k points)

If each of the dimensions of a rectangle is increased by 100%, its area is increased by : 

(1) 100% (2) 200% (3) 300% (4) 400%

1 Answer

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Best answer
(3) Let the initial length and width be l & b respectively.

Then the initial area = l × b

According to the question,

New length and width will be 2 l and 2b respectively.

New area = 2 l × 2b = 4 l b

Increment in area

4lb-lb/lb x 100%= 300%

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