Question

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Answer 1

Given that, diameter(d) of cylinder is 1.4 m and length(h) is 8 m.
⇒ the radius of sphere(r) = radius of cylinder
⇒ surface area of tank = surface area of cylinder + 2(surface
Area of hemisphere)
= 2πrh + 2(2πr2)
= 2πr(h + 2r)

= 41.36 m2

Answer 2

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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