The figure shows a pipe of radius 2 cm and height of 5 cm.Calculate its surface area

                                                  

A: 62.86 cm²

B: 209.29 cm²

C: 70.41 cm²

D: 452.58 cm²

Correct Answer : A

Surface area of a cylinder=area of two circles+Area of curved surface

Surface area of a cylinder=2(πr²)+πdh

Since this is a pipe,the circles are just holes since they are open.Hence the surface area of a pipe = πdh

Diameter=2×2=4

= 22/7×4×5

=62.86 cm²

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