2009 · Q54
The ratio of volumes of two cones is 4 : 5 and the ratio of the radii of their bases is 2 : 3. What is the ratio of their vertical heights?
Elementary MathematicsAlgebra
- A5 : 6
- B6 : 5
- C9 : 5
- D5 : 9
Explanation
(4/9)(h₁/h₂) = 4/5 gives h₁:h₂ = 9:5.