Description
When you normally drive the freeway between Sacramento and San Francisco at an average speed of 95.0km/hr (59.0mph ), the trip takes 1.00hr and 28.0min . On a Friday afternoon, however, heavy traffic slows you down to an average of 85.0km/hr (52.8mph ) for the same distance.
How much longer does the trip take on Friday than on the other days?
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