Question

it costs Rs 2200 to paint the inner CSA of a cylindrical vessel 10m deep . If the cost of painting is at the rate of Rs 20 per m². Find —
1. Inner CSA of the vessel
2. Radius of the base
3. Capacity of the vessel.

Answer 1

Cost of painting = Inner curved surface area * Rate of painting

  Inner curved surface area = Cost of painting/Rate of painting

                                               = 2200/20 

                                               = 110m^2.

 Radius of the base = 110 * 7/2 * 22 * 10

                                  = 1.75m.

Capacity of the vessel = pi * r * h

                                      = 22/7 * (1.75)^2 * 10

                                     = 96.25 m^3.


Hope this helps!