Question

A rectangle of length 44 cm is folded along with its length and formed a cylinder. Then the radius of the cylinder (cms) is

A) 44 

B) 22 

C) 11 

D) 7

Answer 1

Correct option is (D) 7

Let radius of cylinder be r cm.

\(\therefore\) Circumference of base of cylinder = Length of rectangle

\(\therefore\) \(2\pi r=44\)

\(\Rightarrow\) \(r=\frac{44}{2\pi}=\frac{44\times7}{2\times22}\) = 7

\(\therefore\) Radius of the cylinder is 7 cm.

Answer 2

Correct option is  D) 7