Number Systems
Quick practice
Question 1 of 5
A truck covers a journey at an average speed of 90 km/h. If the time for which the truck stops during the journey is excluded, then the average speed for the journey becomes 108 km/h. For how much time, on average, does the truck stop every hour?
A
15 minutes
B
10 minutes
C
7.5 minutes
D
12 minutes
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