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The radius of a sphere is increased by 10%. What will be the percentage increase in its surface area ?
- A21 %
- B22 %
- C23 %
- D24 %
Correct answer: A
Discussion 1
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0
CCommunity
21 %
The surface area will be increased by
2 x 10 + 10x10/100
= 20 + 1
= 21%
The surface area will be increased by
2 x 10 + 10x10/100
= 20 + 1
= 21%