A car moves 30 km in 30 min and the next 30km in 40 min. Find average velocity of the car in m/s.
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Answered by
1
Average speed = total distance/ total time
30 min= 30/60 hr = 1/2 hr
40 min= 40/60 hr = 2/3 hr
total time= 1/2+2/3= 7/6 hr
total distance= 30 km+ 30 km= 60 km
average speed= 60/7/6= 60*6/7= 360/7= 51.42 km/hr
Answered by
0
average velocity=(total distance)/total time
total distance=(30+30)km=60000m
total time=(30+40)min=(70×60) second
=60000/(70×60)
=100/7
=14.28m/s
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