The volume of a right circular cylinder, 14 cm in height is equal to that of a cube whose edge is 11 cm. The radius of the base of the cylinder is :

Answer: Option B

Volume of the cylinder :
= Volume of the cube
= (11)³ cm³
= 1331 cm³
Let the radius of the base be r cm
Then,
$$\begin{array}{rl}& \frac{22}{7}\times r^2\times 14=1331\\ & \Rightarrow r^2=\frac{1331}{44}=\frac{121}{4}\\ & \Rightarrow r=\frac{11}{2}\\ & \Rightarrow r=5.5\end{array}$$