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question shows below: 4. Alphonse ran in a cross-country race, running half of the distance at 3 minutes per km and half at 3 minutes

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4. Alphonse ran in a cross-country race, running half of the distance at 3 minutes per km and half at 3 minutes 10 seconds per km. If he had run half o|f the time at 3 minutes per km, and half at 3 minutes 10 seconds per km, it would have taken him 1 second less to nish the race. How long did Alphonse actually take

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