Question

5. A storage tank consists of a circular cylinder with a hemisphere stuck on either end. If the
external diameter of the cylinder be 1.4 m. and its length be 8 m. find the cost of painting
it on the outside at rate of 20 per mi​

Answer 1

Answer:

your Mesasurememts was not correct

Answer 2

Explanation:

We have,

r=0.7m, h=8m

∴ Total surface area = 2πr2+2πrh=2πr(r+h)=2×722×0.7×8.7m2

Required cost = Rs. {2×722×0.7×8.7×10}=Rs.382.80