DRDO Multi tasking staff Model paper 7

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