If each side of rectangle is decreased by 11%, then its area will decrease by:
Show answer & explanation
Correct answer: C
Explanation
Correct Answer is option 3 i.e. 20.79%
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Concept |
Understanding |
Application |
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Decrease in the area if both length and breadth are decreased by x% = x + x – x2/100 |
Given that each side of the rectangle is decreased by 11%. |
Decrement in the area = 11 + 11 – (11 × 11)/100 = 22 – 1.21 = 20.79% |