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Prateek Asked :

13-01-2022 Area

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

A. 25% increase
B. 50% increase
C. 50% decrease
D. 75% decrease

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Dapzoi Verified
Commented on 2022-01-15 11:21:43 (IST)
Answer: Option B



Let original length = x and original breadth = y.

Original area = xy.

New length =    x/2

New breadth = 3y.

New area =  (x/2 x 3y) =   (3/2)xy.

Increase % =  (1/2xy x  1/xy x 100)% = 50%.