The outer diameter of a gas cylinder is 20 cm. Find the cost of the painting of its
outer curved surface at 4 per square centimetre if the height of the cylinder is
70 cm.
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Answer:
Step-by-step explanation:
Given:-
outer diameter of cylinder = 20cm
height of cylinder (h) = 70cm
radius = diameter/2
radius = 20/2 cm
radius = 10 cm
Curved Surface Area(C.S.A) = 2πrh
if cost for painting 1cm square = Rs.4
so cost for painting 4400cm square = 4400 X 4 = Rs. 17600
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