Question

The area of four walls of a room is $91$ $m^2$. If the room is $13m$ long and $4.5m$ broad. Find its height.

Answer 1

Area of four walls $=$ Lateral Surface Area of room $=2h(l+b)sq.units$

Given,

lenth, $l=13m$

breadth, $b=4.5m$

Area of four walls$=105m^2$

$\therefore$ Area of four walls $=2\times h\times (13+4.5)=105m^2$

$2\times h\times 17.5=105m^2$

$h=\frac{105}{2\times 17.5}$

$h=\frac{105}{35}$

$h=3m$

$\therefore$ The height of the room is $3m$