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A storage tank consists of a circular cylinder with a hemisphere stuck on either side. if the external diameterof the cylinder be 1.4m and its length be

8m. find the cost of painting it on the outside at a rate of 20/m square


Tsa of cylinder = 2 pi r( r+h) according to the question Tsa of given cylinder 2 ❌ 22/7❌ 0.7 ( 0.7+ 8)= 4.4❌ 8.7= 42.68sq.m Cost of painting cylinder at rate of 20/sq.m= 42.68❌ 20 = Rs. 853.6
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