If the side of a square is increased by 10% then percentage increase in it's…
2021
If the side of a square is increased by 10% then percentage increase in it's area will be :
Answer: B. 21% — Let the side of the square be s. Original area = s². New side = 1.1s. New area = (1.1s)² = 1.21s². Increase in area = 1.21s² - s² = 0.21s². Percentage…
- A.
10%
- B.
21%
- C.
44%
- D.
100%
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Correct answer: B
Let the side of the square be s.
Original area = s². New side = 1.1s.
New area = (1.1s)² = 1.21s².
Increase in area = 1.21s² - s² = 0.21s².
Percentage increase = (0.21s² / s²) × 100% = 21%.
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