1. Diameter of a roller is 2.4 m and it is 1.68 m long. If it takes 1000 complete revolutions once over to level a field, the area of the field is
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By: anil on 05 May 2019 01.42 am
Radius of roller = 1.2 m and height = 1.68 m Area covered in 1 revolution = $$2 pi r h$$ = $$2 imes frac{22}{7} imes 1.2 imes 1.68$$ = $$44 imes 1.2 imes 0.24 = 12.672 m^2$$ $$ herefore$$ Area of the field = Area covered in 1000 revolutions = $$12.672 imes 1000 = 12672 m^2$$
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