The length of a rectangle is halved, while its breadth is tripled. What is the percentage change in area?
Answer with explanationAnswer: Option B
Let original length = x and original breadth = y.
Original area = xy.
|New length =||x||.|
New breadth = 3y.
|New area =||x||x 3y||=||3||xy.|
|Increase % =||1||xy x||1||x 100||%||= 50%.|
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