The diameter of a roller is 2.5m and it's length is1.4m. How much area with cover in 7 revolution
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the diameter of the roller=2.5 =1.25m
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length of the roller=1.4m
csa of the cylinder=2πrh
csa=(2×22/7×1.25×1.4)m²
csa=11m²
therefore for one revolution it is 11m²
so it will be 11×7=77m²
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