Question

A swimming pool is $20m$ in length, $15m$ in breadth, and $4m$ in depth. Find the cost of corner its floor and walls at the rate of $Rs.12$ per square meter.

Answer 1

Given that,

$l=20m$

$b=15m$

$d=4m$ (d-h)

We know that,

Area for coner its floor$2d\left(l+b\right)+lb$

$=2\left(4\right)\left(20+15\right)+\left(20\times 15\right)$

$=8\times 35+300$

$=280+300$

$=580m^2$

Rate of coner its floor $Rs.12/m^2$

$\therefore$ Total cost of coner its floor $=580\times 12$

$Rs.6960$

Then,

We get $Rs.6960$