a car travels first 100 km @ 25 km/h & then it travels next 140 km @ 70 km/h. what is the average speed of the car?
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answer :
10 km/h
Step-by-step explanation:
average speed = total distance travelled
___________________
total time taken
time taken to travel first 100 km = distance/speed
= 100/25
= 4 hour
time taken to travel next 140 km = 140/70
= 20 hours
We get that :
total distance travelled = 240 km
total time taken = 24 hours
therefore ,
average speed = 240/24
= 10 km/h
Jai Hind
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