1.

To make a road plain a roller has to complete 750 rounds. if the diameter ofroller is 84 cm and length 1 meter then find the area of road.

Answer»

Length of roller = 1m = 100cm

Circumference of roller = π x D = 22/7 X 84 = 264 cm

Length of road = 264 x 750 = 198000 cm

Width of road = length of roller = 100 cm

Area of road = 198000 x 100 = 19,800,000 cm² or 1980 m²



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