Two cyclists start at the same time from the same place in the same direction at speeds of 15 km/hr and 19 km/hr respectively. After how much time will they be 10 km apart?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 2 hours 30 minutes
When two people move in the same direction, the gap between them grows at the difference of their speeds.
Gap gained each hour \(=19-15=4\) km
Time for a gap of 10 km \(\displaystyle =\frac{10}{4}=2\frac{1}{2}\) hr \(=2\) hours 30 minutes