Question

the diameter of a roller is 70 cm and length is 2 m find the area in square metre covered by the roller and 50 complete rounds

Answer 1

CSA of roller=2πrh
r=35cm,.35m
h=2m
2π*.35*2
4.4m^2
Now we have to find in 50 rounds
4.4*50
220m^2
The roller covers 220m^2 area in 50 rounds
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