6.A milk tank is in the form of cylinder whose radius is 1.5 m and length is 7 m. Find the quantity of milk in liters that can be stored in the tank?
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Given, r = 1.5 m, h = 7 m
We have, Volume of the milk tank =\(\pi r^2h\)

\(=\frac { 22 }{ 7 }\times 1.5 \times 1.5 \times 7\)

\(= 22 \times 2.25= 49.50 m^3\)

∴ Volume of milk in litres = \(49.50 \times 1000 L\quad\) [∵ 1 \(m^3\) = 1000 litres]

\(= 49500 L\)

Hence, the required volume of milk = 49500 L.