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| 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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Simply chose a support option
  
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