The Tailwind

We know the distance of the course is 2400 miles. It is now left to find the number of hours of race, t.

Because of the tailwind, the actual valuate of speed of the flight is 640 mph to Hawaii (600 mph flight speed + 40 mph tailwind speed).

The distance flown so outlying(prenominal) is 640t miles

The distance still to be flown to Hawaii is 2400 - 640t miles

If the plane were to recurrence to San Francisco, it would have to fly 640t miles

The flight speed to San Francisco would be 560 mph (600 mph flight speed - 40 mph h

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