A road roller takes 750 complete revolution to move once over to level a road. find the area of the road if the diameter of a road roller is 84cm and length is 1m.
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1
Answer:
Diameter is 84cm so radius is 42cm height is 100cm
now take out its surface area then multiply the surface area with 750 times and you will get the area of the ground
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Answer:
Area of the road = 1980 metres square
Step-by-step explanation:
Area of the road roller = 2 × pie × radius × height
Height will be 100 cm as 1 metre = 100 cm
Therefore, = 2 × 22/7 × 42 × 100
= 2 × 22 × 6 × 100
= 12 × 2200
= 26400 cm square
Therefore, area of the road = 26400 × 750
= 198000 cm square
Therefore, area of the road in metres = 198000÷100
= 1980 metres square
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