Question

it costs ₹2200 to paint the inner curved surface of cylindrical vessel 10m deep if it is painted at the rate of the ₹20 per square meter find inner curved surface of the vessel and the radius of the base​

Answer 1

The answer is as follows:

1.Inner CSA=110 m^2

2.Radius=1.75 m

Answer 2

toatal cost of painting = 2200 rs

cost of painting in per meter= rs 20

curved surface area = 2200/20= 110m

so,

curved surface area= 2πrh

110=2×22/7×r×10

r=110×7/2×22×7

so r = 7/4

hope you understand