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Andrw · Answer 1 · 2019-09-06T15:52:45+0000

The average speed of the car is equal to the distance covered by the car (S=980 km) divided by the time taken (t=11 h):

v= (S)/(t)= (980 km)/(11 h)=89.1 km/h

we can also convert this value into m/s, keeping in mind that

1 km = 1000 m

$1h=60\cdot 60 s=3600 s$
So we have

$v=89.1 (km)/(h) \cdot (1000 m/km)/(3600 s/h)=24.75 m/s$

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