Volumes Practice Test 2

Question : 26 of 40

Marks: +1, -0

If each edge of a cube is increased by 10%, then by how much per cent will the surface area of this cube be increased?

Solution:

Percentage increase in the surface area of the cube =

(x+y+{xy}/{100})%

(10+10+{10×10}/{100})%

= 21%

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