The road roller takes 800 complete revolutions to move once over to level a road.Find the area of the road if the diameter of the road roller is 98cm and length is 1m.
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Answer: 2464 m²
Step-by-step explanation:
Given that the diameter of the road roller = 98 cm = 0.98 m [ 100 cm = 1 m] and length of the roller,h = 1 m
∴ Radius of the roller,r = 0.98 m/2 = 0.49 m
The area covered per revolution = the curved surface area of the roller = 2πrh = 2×22/7×0.49 m × 1 m = 3.08 m²
∴ the area covered in 800 revolutions = the area of the road = 3.08 m²×800 =2464 m²
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