the outer diameter of gas cylinder is 20m. Find the cost of the painting it's outer curved surface at rs.5 per cm if the height of the cylinder is 70cm
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Answer:
radius=20/2 =10m
height = 70cm=0.7m
CSA =2πrh = 2×22/7×10×70 = 4400cm²
1cm = 5rs
4400cm²= 5×4400 = 22000rs
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