Question 59

A square sheet of paper is folded into a cylinder by rolling along its side. What is the ratio of side of the square to the base radius of the cylinder ?

Solution

If the square sheet is folded to cylindrical shape then length of the side of the square is the circumference of base of cylinder.

So, side of square=2πr.

So, required ratio=2πr:r=2π:1.

D is correct choice.

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