Find the volume of a frustum

Maths

Volume and Surface Area Higher 3

Work out the volume of the frustum. Round your answer to 1 decimal place.

If a solid metal sphere with radius 90 cm was melted down to make smaller spheres of with 3 cm radius, how many smaller spheres could be made?

The diagram shows a pencil crayon. The sharpened part of the pencil forms a cone attached to a cylindrical main part of the pencil. Work out the total volume of the pencil crayon to the nearest cm³.

The diagram shows a square based pyramid with a perpendicular height of 30 cm. Work out the volume of the pyramid.

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