A given pipe has a radius of 8 cm and a height of 20 cm.Calculate its surface area
A: 1158 cm²
B: 1005.71 cm²
C: 880 cm²
D: 768 cm²
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=8×2=16 cm
Area=22/7×16×20
=1005.71 cm²
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