If you travel 210 km from town A to town B at a speed of 30 kmph and from there to town C at a speed of 70 kmph for another 140 km, then what is your average speed during the entire journey?a. 16.66 kmphb. 28.28 kmphc. 38.88 kmphd. 50 kmph
Answers
Answered by
15
Answer:
38.88 km/h
Step-by-step explanation:
Average speed = Total distance / total time.
We need to get the time taken for the entire journey.
Time = Distance / Speed
Time from A - B :
Distance = 210 km
Speed = 30 km/h
Time = 210/30 = 7 hrs
Time from B - C:
Distance = 140 km
Speed = 70 km/h
Time = 140/70 = 2 hrs
Total time = 2 + 7 = 9 hrs
Total distance = 140 + 210 = 350 km
Average speed = 350/9 = 38.88 km/h
Answered by
1
Answer:
Average speed = Total distance / total time.
Time = Distance / Speed
Distance = 210 km
Speed = 30 km/h
Time = 210/30 = 7 hrs
Distance = 140 km
Speed = 70 km/h
Time = 140/70 = 2 hrs
Total time = 2 + 7 = 9 hrs
Total distance = 140 + 210 = 350 km
Average speed = 350/9 = 38.88 km/h
ANSWER IS 38.8 KM/H
Step-by-step explanation:
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