ALGEBRA 2, 2012
42

 PAGE: 602 SET: Exercises PROBLEM: 42

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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