A road roller takes 300 complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is 1.4 m and length is 1.5 m. (Use TT-22/7)
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Answer:
1980m²
Step-by-step explanation:
Diameter of road roller = 1.4 m
radius of road roller = 1.4/2 = 0.7 m
length (height ) of road roller = 1.5 m
lateral surface area of road roller = 2πrh
=2×22/7×0.7×1.5 ( cut 0.7 from 7 = 0.1)
=2×22×0.1×1.5
=44×0.15
= 6.6 m²
Area of road = 300× LSA of road roller
= 300× 6.6
= 1980 m²
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