1. A farmer travelled a distance of 61 km in 9 hrs. He travelled partly on foot at the rate of 4 km/hr and partly on bicycle at the rate of 9 km/hr. The distance travelled on foot is





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  • By: anil on 05 May 2019 01.51 am
    Let the distance travelled on foot be $$x km$$ => Distance travelled on bicycle = $$(61-x) km$$ Time taken to travel on foot = $$frac{x}{4}$$ hrs Time taken to travel on bicycle = $$frac{61-x}{9}$$ hrs => Total time = 9 = $$frac{x}{4} + frac{61-x}{9}$$ => $$9x + 244 - 4x = 324$$ => $$5x = 324-244$$ => $$x = frac{80}{5} = 16$$ km
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