# Constant motion

The car has undergone constant motion 120 km in 1 hour 30 minutes. Determine its average speed. Determine how long car drove in the first 20 minutes and 50 minutes from the start of the move.

Result

v =  80 km/h
s1 =  26.667 km
s2 =  66.667 km

#### Solution:

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#### To solve this example are needed these knowledge from mathematics:

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