I walked from A point to B point at 4 km/h and returned running at 8 km/h.
The time of a round trip was 45 minutes.
Find the distance between A and B.
Answer
2 km
Solution
Ratio of the speed = 1 : 2.
Ratio of the time = 2 : 1.
Time of going is 45 minutes × 2/3 = 30 minutes.
Therefore, 4 km/h × 30/60 = 2 km.
