Each side of a rectangular field is increased by 10%. Find the percentage increase in the area of the field.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e 21%.
| Understanding/Application |
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Let the length and breadth of the rectangle be l and b. Area of the rectangle = lb Length after it is increased by 10% = 110l/100 Breadth after it is increased by 10% = 110b/100 New area = (110l/100)110b/100 = 1.21lb |
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Percentage increase = ((1.21lb - lb)/lb) × 100 = 21% |