Two boys start running at the same time from the same place in the same direction at speeds of 10 km/hr and 12 km/hr respectively. After how much time will they be 8 km apart?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4 hours
When two people move in the same direction, the gap between them grows at the difference of their speeds.
Gap gained each hour \(=12-10=2\) km
Time for a gap of 8 km \(\displaystyle =\frac{8}{2}=4\) hr