A person covers 40% of the distance from A to B at 10 km/hr, 40% of the remaining distance at 9 km/hr. and the rest at 12 km/h. His average speed (in km/hr) for the journey is?
Answer: Option C
Sol:
Ratio of distance = (40%: 24%: 36%) × 3
= 120 km: 72 km: 108 km
