An air craft carried made a trip to guam and back.
The trip there took hours and the trip back took hours.
Average speed on the return trip is .
Find average speed of the trip to guam.
Let the average speed of the wind be kilometers per hour.
Formula for distance is .
Distance with trip to guam is
Distance with trip to back is
The distances going and coming are equal.
Therefore,
(Simplify)
(Divide each side by )
(Cancel common terms)
Therefore, the average speed of the wind is .
Option B is right choice.
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