Question

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

• A. 300

Answer 1

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)
$=2h(l+b)$
$=2\times 5\times (10+20)$
$=10\times 30$
$=300c{m}^2$