a train travels the first 15 km at a uniform speed of 30 km/h;the next 75 km at a uniform speed of 50 km/h;and the last 10km at a uniform speed of 20 km/h.calculate the average speedfor the entire train journey
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t1=15/30=1/2h
t2=75/50=3/2h
t3=10/20=1/2h
total distance=15+75+10=110 km
total time=1/2+3/2+1/2=5/2h
average speed=total distance/total time
=110/(5/2)
=44km/h
thus average speed = 44 km/h
PLZ THANK ME
t2=75/50=3/2h
t3=10/20=1/2h
total distance=15+75+10=110 km
total time=1/2+3/2+1/2=5/2h
average speed=total distance/total time
=110/(5/2)
=44km/h
thus average speed = 44 km/h
PLZ THANK ME
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