a car travels at a rate of 30 kilometre per hour for 5 minutes and then 40 kilometre per hour for 10 minutes find the total distance travelled by the car and its average speed
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s in first travel=v×t=30×5/60=5/2km
s in second travel=40×10/60=2/3km
now total s=5/2+2/3=15/4
v
s in second travel=40×10/60=2/3km
now total s=5/2+2/3=15/4
v
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