A rectangular piece of paper is 22 cm in length and 10 cm in width. It is rolled
into.a cylinder along its length. Find the surface area of this cylinder.
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Answer:
h of cylinder=22 cm
perimeter of circle=10 cm
2 × (22/7)r = 10
r = (5 × 7)/22
surface area = 2 × (22/7) ×( 35 /22) ×22
= 220cm^2
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