Question

find the cost of sinking a tube well 280 m deep having diameter 3m at the rate of Rs 3.50 per cubic metre.​

Answer 1

Answer:

2260.8

Step-by-step explanation:

The total volume of the tube = πr²h

[here r = radice and h = hight ]

so the volume is

$= 3.14 \times {3}^{2} \times 280 \: {m}^{3}$

$= 7912.8 \: {m}^{3}$

the cost of 1 m³ is 3.50 rs

so, the total cost is

$= 7912.8 \times 3.50 \: rs$

$= 2260.8 \: rs$