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CBSE Class 8 Answered

A road roller takes 20 complete revolutions to move once over to level a road. Find the area of the road, if the radius of a road roller is 3.5 metres and height is 2 metres.
Asked by pruthvirajput2209 | 28 Jan, 2020, 12:32: PM
answered-by-expert Expert Answer
 
 
In one revolution, area of the road covered = 2∏rh
                                                               = 2×22/7×3.5×2
                                                               = 44 m2
In 20 revolutions, area of the road covered = 20 × 44 = 880 m2
Answered by Yasmeen Khan | 28 Jan, 2020, 02:59: PM

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