Question

Find the area of four walls(in $m^2$) of a room whose length $3.5$ m, breadth $2.5$ m and height $3$ m.

Answer 1

Area = $2h(l+b)$
We have,$l$ = $3.5m$; $b=$ $2.5m$; $h=$ $3m$
So, Area = $\left(2\right)\left(3\right)[3.5+2.5]$= $6\left(6\right)$ = $36m^2$