Question

It costs ` 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. Ifthe cost of painting is at the rate of ` 20 per m 2 , find(i) inner curved surface area of the vessel,

Answer 1

Cost if painting = inner curved surface area × rate of painting

rs 2200= inner curved surface area×20

2200/20= inner curved surface area

Inner curved surface area =110