A box has length, breadth and height of 10 cm, 20 cm and 5 cm, respectively. Find lateral surface area of it.
300

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Solution

The correct option is A 300
Given,
length $l$ = 10 cm
breadth $b$ = 20 cm
height $h$ = 5 cm

Since the measurement of each side is different, we can assume it as a cuboid.

Lateral surface area of the box (cuboid)
$= 2 h (l + b)$
$= 2 \times 5 \times (10 + 20)$
$= 10 \times 30$
$= 300 c m^{2}$

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