Question

If each side of a cube is increased by 40%,then the percentage increase in its surface area is​

Answer 1

Answer:

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Step-by-step explanation:

Each edge of a cube is increased by 40%. The increased in surface area is given by, The percentage increase in surface area is given by, Therefore, the % increased in the surface area is 96%

Answer 2

Answer:

96 %

Step-by-step explanation:

Let each side of a cube be 10 units.

Surface area = 6a^2(where a is a side)

= 6 x 10^2 = 6 x 100 = 600 units

40 % of 10 = 4

10+4=14 units       Surface Area = 6 x 14^2 = 6 x 196 = 1176 units

1176-600=576

So 576/600 x 100 = 576/6 = 96 %