Question

a water reservoir is 22 M long 16 m broad and 10 M height find the cost of cementing it's floor and the four wall at the rate of 19 Rupees per metre square ?

Answer 1

this how you can do ok this is correct

Answer 2

Answer:

cost of cementing=21,128 Rupees

Step-by-step explanation:

A water reservoir is 22 M long 16 m broad and 10 M height.

So, it's a cuboid with dimensions

l=22 m

b=16 m

h=10 m

Find the area of cementing:

Area to be cemented= Area of base+ lateral surface area

$= lb + 2(lh + bh) \\ \\ = 22 \times 16 + 2(22 \times 10 + 16 \times 10) \\ \\ = 352 +2 (220 + 160) \\ \\ = 352 + 2(380) \\ \\ = 352 + 760 \\ \\ = 1112 {m}^{2}$

cost of cementing at the rate of 19 Rupees per metre square is

$= 1112 \times 19 \\ \\ = 21128 \: rupees$

Hope it helps you.