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Total Surface Area of a Cuboid

If the volume...

Question

If the volume of a class room with length $24$ m and breadth $20$ m is $5760$ m $^{3}$ , find the height and the lateral surface area of the room.

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Solution

$l b h = 5760 ㎥$
$\Rightarrow h = \frac{5760}{24 \times 20} m$
$= 12 m$
Lateral surface area $= 2 h (l + b)$
$= 2 \times 12 (44)$
$= 1056 ㎡$

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