A man covered a certain distance by a train at the speed of 40 km/hr and covers the same distance back by walking at the speed of 8 km/hr. If the whole journey took 12 hours, then what is the one side distance (in km)?
Let total distance covered (both sides) = $$2d$$ km
Speed of train = 40 km/hr and walking speed = 8 km/hr
Using, time = distance/speed
=> $$\frac{d}{40}+\frac{d}{8}=12$$
=> $$\frac{6d}{40}=12$$
=> $$d=12\times\frac{40}{6}=80$$ km
=> Ans - (A)
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