A rectangular paper of dimension 22 cm
x 8 cm is formed into a hollow cylinder
by rolling it along its length. Find the
radius of the cylinder so formed.
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Step-by-step explanation:
Answer: It will be 3.5cm. If you are rolling a paper along 40cm length, in that case 22cm will form the circumference of circle. So, 2*22/7*r=22, leading to r=3.5cm, where r is radius of the circle.
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