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1. A motorist travels to a place 150 km away at an average speed of 50 km and returns at 30 km per hour. What is his average speed for the whole journey in km per hour?
- A. 35
- B. 35
- C. 35
- D. 35
Answer: Option C
Explanation:
Total time spent in the whole journy = 150/50 + 150/30 = 3 + 5 = 8 hours
The average speed of the whole journy = total distance/total time = (150 + 150)/8 = 37.5 km/hr
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