A closed cylindrincal tank of diameter 21 m and height 4 m is made of steel. How much area of steel sheet is required?
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Answer:
r = 10.5 m
h = 4 m
Total Surface Area of Cylinder = 2πr(h+r)
∴, 2 x 22/7 x 10.5 x (4+10.5)
2 x 22 x 1.5 x 14.5
44 x 21.75
∴, Area of steel sheet required = 957 cm²
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