Question

Assuming pool is $15m$ in length, $12m$ in breadth and $2m$ in depth. Find the cost of cementing the floor and wall at the rate of $Rs.15$ per $sq.m$.

Answer 1

Length of pool $\left(l\right)=15m$

Breadth of pool $\left(b\right)=12m$

Height of pool $\left(h\right)=2m$

Now,

Area of floor

$=l\times b=15\times 12=180m^2$

Area of walls

$=2h(l+b)=2\times 2(15+12)=4\times 27=108m^2$

Total area $=108+180=288m^2$

Cost of cementing $=Rs.15$ per square meter

Therefore,

Cost of cementing the floor and wall of pool $=15\times 288=Rs.4320$