The lateral surface area of a cuboid is 480 $m^{2}$ . Its height is 12m. The perimeter of its base is

35 m

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40 m

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42 m

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36 m

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Solution

The correct option is B
40 m

Given LSA = 480 $m^{2}$

Height = 12 m

LSA = Perimeter of the base x height

480 = perimeter of the base x 12

$∴$ perimeter of the base = $\frac{480}{12}$ = 40 m

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