If each edge of a cube is doubled how many times will its surface area increase?
Let initially the edge of the cube be l.
Initial surface area = 6l2
If each edge of the cube is doubled, then it becomes 2l.
New surface area = 6(2l)2 = 24l2 = 4 × 6l2
Clearly, the surface area will be increased by 4 times.
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