A metallic hemisphere is melted and recat in the shape of a cone with the same base radius (R) as that of the hemisphere. If H is the height of the cone, then :	Choose the correct choice from the following choices:
A) H = 2R
B) H = 4R
C) H = √4R
D) H = 2/3 R
E) None
Sol.   2/3 ∏R³ = 1/3 ∏R²H ⇒ H = 2R.   H = 2Rnswer H = 2R
<result>A</result>
A metallic hemisphere is melted and recat in the shape of a cone with the same base radius (R) as that of the hemisphere. If H is the height of the cone, then :