i) 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:56.66kmph
Explanation:v1=50kmph
t1=30 mins=30/60 hr
V2=30kmph
t2=15
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