Volume = πr2h
=227×14×14×h
Given: Volume = 6160 m3
Hence 227×14×14×h=6160
h = 6160×722×14×14 = 10 m
Now,
Curved surface area = 2πrh
= 2×227×14×10
= 880 m2
Cost of painting = Rs.3 per m2
Hence Total cost of painting = 880×3 = Rs 2640
A cylindrical tank has a capacity of 6160 m3. Find its depth if its radius is 14 m. Calculate the cost of painting its curved surface (outer) at the rate of Rs. 3 per m2.