A cylindrical hollow tube open at both the ends has to be painted on internal and external sides open at both the ends. The internal diameter of the cylinder is 2.4m and the thickness is 0.4m. The height of the cylinder is 10m. Calculate the lateral surface area which has to be painted.If one can of paint can be used for 8 cubic metre,how many cans of paint are required to paint it.
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LSA=52×3.14
cans=(52÷8)×3.14
cans=(52÷8)×3.14
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