the diameter of a garden roller is 1.4m and it is 2m long. how much area will it cover in 5 revolutions?
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Answered by
1
2×22/7×0.7×2=8.8square metre.
area cover in 5 revolutions=8.8×5=44m. square
area cover in 5 revolutions=8.8×5=44m. square
Answered by
2
Diameter = 1.4 m
Radius = 1.2 m
height = 2m
l^2 = h^2 + r^2
l^2 = (2×2)+(1.2×1.2)
l = √5.76
l = 2.4 m
Area covered in one revolution
= Lateral surface area of the cylinder
= πrl
= (22/7)×(1.2)×2.4
= 63.36/7
= 9.0511 sq.m
Area covered in 5 revolution
= 5×9.0511
= 45.25 sq.m
Radius = 1.2 m
height = 2m
l^2 = h^2 + r^2
l^2 = (2×2)+(1.2×1.2)
l = √5.76
l = 2.4 m
Area covered in one revolution
= Lateral surface area of the cylinder
= πrl
= (22/7)×(1.2)×2.4
= 63.36/7
= 9.0511 sq.m
Area covered in 5 revolution
= 5×9.0511
= 45.25 sq.m
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