A car moves with speed of 30km/h for half an hour,25km/h for 1h and 40km/h for 2h calaculate average speed
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35 km/h is the average speed
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speed=30km/h
time=0.5hrs
distance=s*t
=15km
speed=25km/h
time=1hrs
distance=s*t
=25km
speed=40km/h
time=2hrs
distance=s*t
=80km
average speed= total distance/total
time taken
= (15+25+80)/(1+2+0.5)
= 120/3.5
= 34.28km/h.
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