Question

A cylindrical drum which is open at the top has a radius 0.7 m and height 1.2 m . Find the cost of electroplating this drum from the inside at the ratye of 7.50 per metre square

Answer 1

CSA of cylinder=2πrh

area of base =πr×r

total area =2πrh+πrr

substituting the values

ans:6.28m2

cost of electroplating=6.28×7.50=

51.15