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Mathematics, 22.06.2019 10:00 nails4life324

When visiting his parents, tyler drives at an average speed of 42 km/h through urban areas, and at an average speed of 105 km/h along the motorway. his journey usually takes him 2.5 hours. one day when there is a fog, he sets off 1 hour early and only manages to average 28 km/h in urban areas and 60 km/h on the motorway. he arrives 30 minutes late. how long was tyler journey?

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