"Question 9 A road roller takes 750 complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is 84 cm and length is 1 m.
Class 8 Mensuration Page 186"
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circumferensce =2*22/7*r=2*22/7*42
=2*22*6=264cm
so 264*750=198000cm=198000/100=1980m
area=l*b=1*1980=1980m2
=2*22*6=264cm
so 264*750=198000cm=198000/100=1980m
area=l*b=1*1980=1980m2
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