A rectangular paper of 44cm X 10 cm is rolled along its length to form a cylinder . What is the radius of its base .

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Solution

Solution -: Since it is rolled along its length .It means circumference of the circle = 44 cm

Let the radius be r

we know that the length of the sheet = circumference of the circle = 44 cms

we know that circumference of circle = 2pir

2pir= 44 , but pi= 22/7
2 22/7 r= 44
44/7*r= 44
We got r= 7 cms
Radius = 7 cms. Answer

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