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
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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
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