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 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
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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.
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