A car travels 30km at uniform speed of 40km and the 30km at aspeed of 20km . find the average speed
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time=distance/speed
time 1=30/40 =0.75h
time 2=30/20 =1.5h
average speed= total distance/total time
=(30+30) / (0.75+1.5)
26.7 km/h
time 1=30/40 =0.75h
time 2=30/20 =1.5h
average speed= total distance/total time
=(30+30) / (0.75+1.5)
26.7 km/h
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