Length of a rectangle is increased by 20% while breadth reduced by 10%. Find the % change in its area?
Explanation:
Let the length and breadth of rectangle be L and B. So area = LB
New Length = 1.2L
New Breadth = 0.9B
Hence new area = 1.2L × 0.9B = 1.08 LB
Percentage change in area = (1.08 LB - LB)/LB × 100 = 8% increase.
Hence, option (e).
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