Question

Q6. The diagram shows a metal cuboid. A cylindrical hole of radius 7cm is drilled

it from the top to the bottom.
What is the volume, in cm of the remaining metal in the cuboid?
​

Answer 1

Volume of remaining cuboid = volume of cuboid - volume of cylinder drilled out

= (Length x Breadth x Height) - (

`\pi {r}^(2) * height`

= (30 x 20 x 10) - (π x 7 x 7 x 10)

= 6000 - 490π

= 4460.619 cm^3