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A person takes a trip, driving with a constant speed of 90.5 km/h, except for a...

A person takes a trip, driving with a constant speed of 90.5 km/h, except for a 30.0-min rest stop. The person's average speed is 71.0 km/h.

(a) How much time is spent on the trip?

(b) How far does the person travel?

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