A car moves with a speed of 30 km hr for half an hour , 25 km / hr for one hour and 40 km h for two hours calculate the average speed of the car
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Answer: 34.28km/hr
Distance covered in half an hour at 30km/hr=s*t=30*1/2=15km
Distance covered in 1hour at 25km/hr=s*t=25*1=25km
Distance covered in 2hours at 40km/
hr=s*t=40*2=80km
Therefore, total distance covered =15+25+80=120km
Total time taken=3hr&30minutes=7/2 hours
Therefore, average speed=total distance covered/total time take=120*2/7=34.28km/hr
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