IT Placement Practice Test 4

Let the distance be 12 km. So the old man speed = 12 km12hr = 24 kmph
The young man speed = 12 km13hr = 36 kmph
As the old man started 5 minutes earlier, he covers 24×560 = 2 km in 5 minutes.
Now the time taken to the young man to meets him = 236−24×60 = 10 min.
So the time at which young man meet the old man = 10.05 + 10 = 10:15 min.