Question

A cylindrical well is 15 meters deep and has a diameter of 1.6 meters. Approximately how many cubic meters of soil were dug out to make the well? (Use π = 3.14.) 30.14 cubic meters 37.68 cubic meters 120.57 cubic meters 188.40 cubic meters?

Answer 1

30.14 cubic meters

Explanation:

I got it correct on my test :)

Answer 2

We can dig out the soil from the well equal to volume of well.

Height(h) of well is = 15 meters.

Diameter = 1.6 meters.

So radius(r) =
`(1.6)/(2) = 0.8` meter.

As well in cylindrical shapes.

So volume of well =
`\pi r^2h`
=
`\pi * (0.8)^2 * 15`

`= 9.6 * \pi`
In general
`\pi = 3.14`

So volume of well is =
`9.6 * 3.14`

`= 30.144` cubic meter.

So we can dig out 30.144 cubic meter soil from well.