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The edge of a cube is increased by `100%` , then the lateral surface area of the cube is increased by _______`%` |
Answer» Correct Answer - 3 Let the edge of the cube be a units. Lateral surface area of the cube `=4a^2` sq.units. If edge of the cube is increased by `100%` ,then new edge `=2a`. The lateral surface area of the new cube `=4(2a)^2=16a^2` sq.units. Increase in area `=16a^2-4a^2=12a^2` `%` increase in area `=(12a^2xx100%)/(4a^2)=300%`. |
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