Question

Sumit wants to put up wallpaper the wall of his room of dimensions 400 cm by 520 cm. Find the length of the wallpaper needed by Sumit in metres.​

Answer 1

Hello again.

Since the question asked for the length in metres, I answered that in the previous question asked by you.

Here is to find perimeter and area in case either of these answers matches with your answer.

$b = 400 \: cm \\ l = 520 \: cm \\ perimeter = 2(l + b) \\ = 2(520+400) \\ = 2(920) = 1840 \: cm \: or \: 18.4 \: m$

$area = l \times b \\ = 520 \times 400 \\ = 208000 \: cm \: or \: 2080 \: m$