Question

a swimming pool is 20 m in length 15 m in breadth and 4m in depth find the cost of cementing its floor and walls at the rate of Rs 12 per square metre

Answer 1

Answer:

Step-by-step explanation:

Answer 2

AnswEr:

We have ,

• L = length of the swimming pool = 20 m

• B = breadth of the swimming pool = 15 m

• H = height of the swimming pool = 4m

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$\therefore$ $\sf{Area\:of\:four\:walls\:of\:swimming\:pool}$

$\Rightarrow$ $\sf{2\times\:4\times(20+15)m^2}$

$\Rightarrow$ $\sf{8\times\:35\:m^2=280\:m^2}$

◕ Area of the floor of the swimming pool = $\sf{l\times\:b}$

$\Rightarrow$ $\sf{20\times\:15\:m^2}$

$\Rightarrow$ $\sf\blue{300\:m^2}$

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$\therefore$ Total area to be cemented

$\Rightarrow$ $\sf{(280+300)m^2}$

$\Rightarrow$ $\sf\red{580\:m^2}$

⌣ Cost of cementing of 1 sq m = Rs 12.

_______________________________

$\therefore$ Cost of cementing the floor and the walls

$\Rightarrow$ $\sf{Rs(12\times\:580)}$

$\Rightarrow$ $\sf\purple{Rs\:6960}$

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