Question

A box has length, breadth and height of 10 cm, 20 cm and 5 cm respectively. The lateral surface area of the box is ______.

• A. 100 $c{m}^2$​
• B. 200 $c{m}^2$​
• C. 300 $c{m}^2$​
• D. 400 $c{m}^2$​

Answer 1

The correct option is C 300 $c{m}^2$​

Given,
length $\left(l\right)$ = 10 cm
breadth (b) = 20 cm
height (h) = 5 cm

Since each side's measurement is different, we can assume it as cuboid.

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