1. The wheel of a motor car makes 1000 revolutions in moving 440 m. The diameter (in metre) of the wheel is
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By: anil on 05 May 2019 01.41 am
In 1 revolution, the wheel covers the the circumference. Distance covered in 1000 revolutions = 440 m => Distance covered in 1 revolution = 0.44 m => $$2 pi r = 0.44$$ => $$2 imes frac{22}{7} imes r = 0.44$$ => $$r = frac{0.44 imes 7}{44} = 0.07$$ m $$ herefore$$ Diameter of wheel = $$2 imes 0.07 = 0.14$$ m
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