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Q.

Lateral surface area of a cylinder is


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a

2πr2

b

2πrh2

c

2πrh

d

None of the above 

answer is C.

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Detailed Solution

We have to find the lateral surface area of a cylinder.
We know,
Area of lateral surface of cylinder = Curved surface of cylinder
Also we know,
Circumference, C=2πr where r is the radius of cylinder.
Therefore,
Curved surface of cylinder = Circular base's circumference×height
Therefore, lateral surface area of a cylinder =2πrh Hence, option 3 is correct.
 
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Lateral surface area of a cylinder is