A car travel to a place 150 km away at an average speed of 50 km/hr and returns it 30 km/hr. What is the average speed of the whole journey?
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Q:
A car travel to a place 150 km away at an average speed of 50 km/hr and returns it 30 km/hr. What is the average speed of the whole journey?
- 135.5 km/hrfalse
- 237.5 km/hrtrue
- 340.5 km/hrfalse
- 433.5 km/hrfalse
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