Anil goes to his office at the speed of 35 km/hr and returns to his home at the speed of 30 km/hr. If he takes total 39 hours, then what is the distance between his office and home?
Let distance between his office and home = $$d$$ km
Using, time = distance/speed
=> $$\frac{d}{35}+\frac{d}{30}=39$$
=> $$\frac{6d+7d}{210}=39$$
=> $$d=210\times3=630$$ km
=> Ans - (C)
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