Q : 5    It costs Rs 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If the cost of painting is at the rate of Rs 20 per \small m^2, find

(i) inner curved surface area of the vessel,

Answers (1)

(i) Given,

Rs 20 is the cost of painting 1\small m^2 area of the inner curved surface of the cylinder. 

\therefore Rs 2200 is the cost of painting \frac{1}{20}\times2200 = 110\ m^2area of the inner curved surface of the cylinder. 

\therefore The inner curved surface area of the cylindrical vessel = 110\ m^2

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