Engineering Board Exam Reviewer · Motion Problems · easy
A car travels 270 km in 3 hours and then 130 km in 2 hours. What is its average speed for the whole trip?
- 77.5 km/h
- 80 km/h
- 90 km/h
- 65 km/h
Answer
B. 80 km/h
Solution
Average speed is total distance over total time: 270+130/3+2=400/5=80 km/h.
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