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If each edge of a cube is increased by 40%, the percentage increase in its surface area is
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- 40%
- 60%
- 80%
- 96%
- 40%
Correct Option: D
Using Rule 10,
Required percentage increase = | 40 + 40 + | % = 96% | |||
100 |
Or
Let edge = 10, S. Area = 600,
New edge = 14 ⇒ New surface area = 6 × 142 = 6 × 196 = 1176.
% increase = | 100 | |||
600 |
= | = 96% | |
6 |