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A length 550 cm of thin thread wraps around a cylinder exactly 25 times. Calculate the circumference and the radius of the cylinder. (Take `pi=22/7`)

Answer Text:
Circumference = (length of thread)/(number of wraps)
=`550/25`=22cm or 0.22m
Circumference = `2pir`
0.22=2×`22/7`× r
7/44×0.22=`cancel44/cancel7× r×cancel7/cancel44`
r=0.035m