An engineer travels from St. John's, Newfoundland, to the Hibernia oil field in the North Atlantic Ocean on a ship that averages 28 km/hr. After spending 6 hrs at the field, the engineer returns to St. John's in a helicopter that averages 140 km/hr. If the total trip takes 19.5 hrs; how far is the Hibernia oil field from St. John's? O 275 km O 345 km O 225 km O 315 km

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