A petrol tank is a cylinder of diameter 21 and length 18 cm fitted with conical ends each of axis length 9 cm. Determine
the surface area of the petrol tank.
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Volume of the cylindrical portion of the tank= πr²h
=22/7 * (21/7)² * 18cm³ = 174636/ 28 cm³
= 6237cm³
Volume of 2 conical ends
=2 (1/3πr²h) =2/3πr²h =2/3 * 22/7 * (21/2)2 * 9cm³
=174636 / 84 cm³ =2079cm³
Therefore, capacity of the tank= 6237cm³ + 2079cm³ = 8316cm³
Thus, capacity of the tank= 8316cm³
I hope it will help you ❣️❣️
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