An open top cylindrical container has radius 10 cm
and height 30 cm. Find the cost of painting 20 such
cylindrical containers from outside at 105 .
per sq. m
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r = 10
h = 30
area to be painted = 2πrh + 2πr
= 2πr(h+1)
= (440 x 31) /7
total area of 20 cylinders = 440 x 20 x 31/7
total cost = find it out yourself
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