Question

A storage tank consists of a circular cylinder with a hemisphere stuck on either end . if the external diameter of the cylinder be 1.4m. And its length be 8m. find the cost of painting it on the outside at rate of Rs.20 per meter square

Answer 1

Answer:

We have,

r=0.7m,

h=8m

∴ Total surface area = 2πr²+2πrh

=2πr(r+h)

=2×22/7​×0.7×8.7m²

Required cost = Rs. {2×722​×0.7×8.7×20}

=Rs.765.60

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