A rectangle of length 44 cm is folded along with its length and formed

1.	A rectangle of length 44 cm is folded along with its length and formed a cylinder. Then the radius of the cylinder (cms) isA) 44 B) 22 C) 11 D) 7
Answer» 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. Correct option is D) 7

A rectangle of length 44 cm is folded along with its length and formed a cylinder. Then the radius of the cylinder (cms) isA) 44 B) 22 C) 11 D) 7

Answer»

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.

Correct option is D) 7