Question

A swimming pool is 15m in length, 8m in breadth, and 3m in depth. Find the cost of cementing its wall and base at the rate of Rs.12 per m²

Answer 1

Step-by-step explanation:

Length of the swimming pool is, l = 20 m

Breadth of the swimming pool is, b = 15 m

Height of the swimming pool, h = 4 m

To find,

The cost of cementing its floor and walls at the rate of Rs.12 per square metre.

Solution,

The surface area of cuboid to be cemented is given by :

The surface area of the cuboid = area of 4 walls + area of floor

The surface area of the cuboid = Lateral surface area of cuboid + area of floor

The surface area of the cuboid is

\begin{gathered}2h(l+b)+lb\\\\=2\times 4\times (20+15)+20\times 15\\\\=580\ m^2\end{gathered}

2h(l+b)+lb

=2×4×(20+15)+20×15

=580 m

2

For Rs.12 per square metre,

\begin{gathered}A=\text{Rs} 580\times 12\\\\A=\text{Rs}\ 6960\end{gathered}

A=Rs580×12

A=Rs 6960

So, the cost of cementing its floor and walls at the rate of Rs.12 per square metre is Rs 6960.

Answer 2

• answer is 6460
• hope it's help you