Radius of sphere is increased by 50%. By how much percentage
is surface area is increased?
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Answer Posted / aditi joshi
let original radius=100
original surface area lets say it x =4 * (22/7) * 100 *100
new radius=100 + 50% of 100=150
new surface area lets say it y = 4 * (22/7)* 150* 150
increase in surface area=((y-x)/x) * 100
i.e.
((4*(22/7)*150*150 - 4*(22/7)*100 *100) / (4*(22/7)*100*100))*100
=125
so the answer is 125%.
hope this helps you.
| Is This Answer Correct ? | 64 Yes | 17 No |
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