A road roller takes 750 complete revolution to move once over to level a road. Find the are of road, if the diameter of the road roller is 84 cm and length is 1m.
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Diameter = 84cm
r = 84/2 = 42cm
height = 1 meter= 100cm
In one revolution, the roller will cover an area equal to its lateral surface area.
Thus, in 1 revolution, area of the road covered = 2πrh
=2×22/7×42×100cm
26400 cm square
In 750 revolutions, area of the road covered
=750×26400
= 19800000 cm square
r = 84/2 = 42cm
height = 1 meter= 100cm
In one revolution, the roller will cover an area equal to its lateral surface area.
Thus, in 1 revolution, area of the road covered = 2πrh
=2×22/7×42×100cm
26400 cm square
In 750 revolutions, area of the road covered
=750×26400
= 19800000 cm square
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1
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