a car covers a distance of 50 km during first hour 40 kilometre during second hour and 60 kilometre during next 2 hours of its motion along a straight road find the average speed
Answers
Answered by
43
Answer :
Given -
- Distance covered by car in 1st hour is 50 km.
- Distance covered by the car in 2nd hour is 40 km.
- Distance covered by the car in in last two hours is 60 km.
To Find -
- Average Speed ?
Solution -
First Case :
- Distance = 50 km
- Time = 1 hr
Second case :
- Distance = 40 km
- Time = 1 hr
Third case :
- Distance = 60 km
- Time = 2 hr
Now, Average Speed = Total Distance/Total Time.
Hence, Avg. Speed = (50 + 40 + 60)/(4 hr)
⇒ Avg. Speed = 150/4
⇒ Avg. Speed = 37.5 km/hr
⇒ Avg. Speed = 37.5 * 5/18
⇒ Avg. Speed = 10.41 m/s
Hence, Average Speed of the motion is 10.41 m/s.
Answered by
2
Answer:
10.41 m/s
Explanation:
=total distance /total time
=(50+60+40)/(4hrs)
=150\4
=37.4 km/hrs
=5/18 km or hrs
=10.4l km/hrs
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