SOLUTION: A cylindrical oil tank has diameter 7m and height 9m.If the inner side of yhe tank has to be painted all over,what will it cost at Rs35 per sq m?

Question 793317: A cylindrical oil tank has diameter 7m and height 9m.If the inner side of yhe tank has to be painted all over,what will it cost at Rs35 per sq m?
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
With a diameter of 7m, the circumference
= Pi * 7 = 21.99m
The height = 9m
Surface area = 21.99 * 9 + 2* Pi * 3.5^2
Surface area = 197.91 + 76.97
Surface area = 274 .88 m^2
Cost = 274.88 m^2 * Rs 35
Cost = Rs 9620.8.
Hope this helps.
:-)
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