Question
It costs र 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If the cost of painting is at the rate of र 20 per m2, find
(i) inner curved surface area of the vessel,
(ii) radius of the base,
(iii) capacity of the vessel.
Solution
(i) Inner curved surface area of the vessel 
(i) Inner curved surface area of the vessel
Hence, the capacity of the vessel is 96.25 m3 (or 96.25 kl).
(i) Inner curved surface area of the vessel
Hence, the radius of the base is 1.75 m.
(iii) r = 1.75 m
h = 10 m π Capacity of the vessel = 
r2h
Hence, the capacity of the vessel is 96.25 m3 (or 96.25 kl).
