Question

A rectangular paper of dimensions 6 cm and 3 cm is rolled to form a cylinder with height equal to the width of the paper, then its base radius is

• A. $\frac{6}{\pi }cm$
• B. $\frac{3}{2\pi }cm$
• C. $\frac{6}{2\pi }cm$
• D. $\frac{9}{2\pi }cm$

Answer 1

The correct option is C $\frac{6}{2\pi }cm$

The length of the rectangle become the circumference of the base of the cylinder

$\therefore 2\pi r=6\Rightarrow r=\frac{6}{2\pi }$ cm