Speed = distance/time ⇒ Time = distance/speed Let the distance be x km When the man is traveling at a speed of 15 km/hr Time taken, t1= x/15 When the man is returning at a speed of 6 km/hr Time taken, t2= x/6 Total time taken, t1+t2=14hr ⇒ x\15 + x\6 = 14 ⇒ 7x/30 = 14 ⇒ x = 60 km