iii) A car travels at a speed of 50 km/hr for 30
minutes, at 30 km/hr for next 15 minutes
and then 70 km/hr for next 45 minutes.
What is the average speed of the car?
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Answer:
Average Speed = Total distance / Total Time
Therefore,
Total distance = 50+ 30 + 70
= 150 km
= 150000m
Total Time = 30+50+45
= 125m
=7500 seconds
Average Speed : 150000/7500
= 20 m/s
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