A rectangular piece of paper 20cm x 12cm is folded without overlapping to make
a cylinder along its length. Find the curved surface area of the cylinder.
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Step-by-step explanation:
perimeter of rectangle =2 (length + breadth)
=2(20+12)
=2(32)
=64cm²
area of rectangle=length*breadth
=20*12
=240cm² Ans
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