1 thought on “3] The odometer of a car reads 67321 km when the clock show the time 9:30 AM. What is the distance <br /><br />moved by the car, i”
Answer:
Speed = 12.5 m/sec
Step-by-step explanation:
Given –
Car’sodometeron 9:30AM =67321km (start)
Car’s odometeron 9:50AM =67336km (end)
to find–
the speed of car
solution–
to findthe speed we wanttotal distanceand total time.
total distance=odometeron ending–odometeron starting
=67336km–67321km
=15km
1km =1000m
15km =15000m
total time =time on ending–time on starting
=9:50AM –9:30AM
=20minutes
1min =60sec
20min =20×60sec =1200sec
speed =total distance/totaltime
=15000m/1200sec
=150/12m/sec
=12.5m/sec
Hence speed of car =12.5m/sec
hair which changed the unit of time and distance because the SI unit of speed is metre/second or kilometre/hour. if we changed into kilometre and hour the units, the units will be in decimals. then we will face someproblems to getting the speed, that why we changed into metre and second.
Answer:
Speed = 12.5 m/sec
Step-by-step explanation:
Given –
Car’s odometer on 9:30 AM = 67321 km (start)
Car’s odometer on 9:50 AM = 67336 km (end)
to find –
the speed of car
solution –
to find the speed we want total distance and total time.
total distance = odometer on ending – odometer on starting
= 67336 km – 67321 km
= 15 km
1 km = 1000 m
15 km = 15000 m
total time = time on ending – time on starting
= 9:50 AM – 9:30 AM
= 20 minutes
1 min = 60 sec
20 min = 20×60 sec = 1200 sec
speed = total distance / total time
= 15000 m/1200 sec
= 150/12 m/sec
= 12.5 m/sec
Hence speed of car = 12.5 m/sec
hair which changed the unit of time and distance because the SI unit of speed is metre/second or kilometre/hour. if we changed into kilometre and hour the units, the units will be in decimals. then we will face some problems to getting the speed, that why we changed into metre and second.
hope it helps.