what does the odometer of an automobile measure? A girl moves with the speed of 6 kilometre per hour for 2 hours and with the speed of 4 kilometre per hour for the next 3 hours. find the average speed of the girl and total distance moved?
Answers
Answer:
The average speed of the girl is 4.8 km/h and the total distance is 24 km.
The girl moves with different velocity in different span of time. The average speed is calculated by knowing total distance covered in total time.
Given:
Speed 1 = 6 km/hr
Time 1 = 2 hr
Speed 2 = 4 km/hr
Time 2 = 3 hr
As we know that
Total distance covered = d1 + d2
Total distance d = d1 + d2
d = 12 + 12
d = 24 km
Total time t = time1 + time2
t = 2 + 3
t = 5 hr
Average speed = Total distance / Total time
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Answer: An odometer of a car measures distance traveled by the car. Average speed = 4.8km/h Total distance = 24km
Explanation: distance= speed*time
Distance in 1st 2 hours = 6*2= 12km
Distance in next 3 hours = 4*3 = 12km
Total distance travelled = 12+12 = 24 km
Average speed = Total distance/Total time
=> 24/ 5 = 4.8km/h
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