Question

The cost of painting the cost of painting the total outside surface of a closed cylindrical oil tank at 60 paise per square cm is rupees 237. 60 the height of the tank is 6 then the radius of the base of the tank find its volume correct to 2 decimal placeholder

Answer 1

Let the radius = r dm
then height = 6r dm
volume of cylinder= π r2 h
                            =   π r2 x 6 r
the cost of painting  the cylinder 60 paise per dm2 is given by  237.60
i.e. volume x 0.6 = 237.60
volume= 237.60/0.6
           = 396 dm2
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