2012 · Q85
A right circular metal cone (solid) is 8 cm high and the radius is 2 cm. It is melted and recast into a sphere. What is the radius of the sphere?
Elementary MathematicsMensuration
- A2 cm
- B3 cm
- C4 cm
- D5 cm
Explanation
(1/3)*pi*4*8 = (4/3)*pi*r^3 gives r^3 = 8, so r = 2 cm.