Question

Choose the correct answer from the alternatives given.
If a rectangular paper of length 6 cm and width 3 cm is rolled to form a cylinder with height equal to the width of the paper, then its base radius (in cm)

• A. $6/\pi$
• B. $3/\pi$
• C. 3/2
• D. 9/2 $\pi$

Answer 1

Answer: (B)

$3/\pi$

The width of the paper becomes the height of the cylinder and the length of the paper is the circumference of the base of the cylinder.

$\therefore$$2\pi r$=$6$

$\therefore r$=$3/\pi$