11. Five marks exercise problem VI

The internal and external diameter of a hollow hemispherical shell are $6 \ cm$ and $10 \ cm$ respectively. If it is melted and recast into a solid cylinder of diameter $14 \ cm$, then find the height of the cylinder.

 

Answer:

 

The height of the cylinder $=$  $cm$

 

[Note: Enter your answer up to two decimal places.]