A car travels 54km/h for 20 secs, 36km/h for 30 secs and 18km/h for 10 secs. Find its average speed
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in each case first find the distance
1km/hr=5/18m/s
54*5/18=15m/s
T=20sec
so D=s*t
=15*20=300m
36km/hr=10m/s
so D=s*t
=10*30=300m
and 18km/hr=5m/s
so D=s*t
=5*10=50m
average speed=total distance/total time
=650/60=10.83m/s
hope this will help you
good luck
1km/hr=5/18m/s
54*5/18=15m/s
T=20sec
so D=s*t
=15*20=300m
36km/hr=10m/s
so D=s*t
=10*30=300m
and 18km/hr=5m/s
so D=s*t
=5*10=50m
average speed=total distance/total time
=650/60=10.83m/s
hope this will help you
good luck
ayushman768002:
mark as brainliest please
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