The diameter of s road roller is 8cm and it is 1.20m long. What is the area of levelled surface,when it rolles once?
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In your question diameter should be in meter.
Length of roller = 1.20m.
Diameter of road roller = 8m.
Radius = 1/2 x Diameter.
Radius = 1/2 x 8
[Radius = 4m.]
Curved surface area of a cylinder = 2πrh.
= 2 x 3.14 x 4 x 1.20
= 30.144 sqm.
therefore 30.144 sqm area will be leveled when roller rolles at once.
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