bumblebee123
Junior Member
- Joined
- Jan 3, 2018
- Messages
- 200
I've been puzzling over a maths past paper question for a long time, but I still can't figure it out. can anyone explain the answer to me?
Question: a frustum is made by removing a small cone from a large cone. the cones are mathematically similar
the cone has base radius r cm and height h cm
given that volume of frustum/ volume of large cone = 98 / 125
find an expression, in terms of h, for the height of the frustum
I know this must be to do with scale factors, but whatever I try makes no sense and gives me the wrong answer. any help would be really appreciated
Question: a frustum is made by removing a small cone from a large cone. the cones are mathematically similar
the cone has base radius r cm and height h cm
given that volume of frustum/ volume of large cone = 98 / 125
find an expression, in terms of h, for the height of the frustum
I know this must be to do with scale factors, but whatever I try makes no sense and gives me the wrong answer. any help would be really appreciated