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If length , b...

Question

If length , breadth and height of cuboid are increased by 20 %,what is the percentage increase in the the total surface area of cuboid?

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Solution

Let l, b, h be the original dimensions

New dimensions = (1.2 l), (1.2 b),(1.2 h)

New total surface area = 2(lb + bh + hl) = 1.44 x 2(lb+bh+lh)

$\Rightarrow$ 44 % increase in the total surface area.

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