Question

The cost of painting the inner curved surface area of a cylindrical container of depth 20 m is Rs. 8800. If a painter takes Rs. 40 per metre square to paint the cylindrical container, find the inner curved surface area of the vessel.(in $m^2$)

___

Answer 1

Cost of painting the inner curved surface = Rs. 8800.
Cost of painting per square meter = Rs. 40
Hence, painted area $=\frac{8800}{40}=220m^2$
Thus, inner curved surface area $=220m^2$