SOLUTION: Airplane A travels North at 12 mph and Airplane B travels West at 9 mph. How far away will the planes be from each other 20 minutes after they left the same airport?

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Question 602266: Airplane A travels North at 12 mph and Airplane B travels West at 9 mph. How far away will the planes be from each other 20 minutes after they left the same airport?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Airplane A travels North at 12 mph and Airplane B travels West at 9 mph.
How far away will the planes be from each other 20 minutes after they left the same airport?
:
Find how far each will travel in 20 min which is 1/3 of an hour
1%2F3 * 12 = 4 mi
1%2F3 * 9 = 3 mi
:
The distance between them will be the hypotenuse
:
d = sqrt%284%5E2%2B3%5E2%29
d = sqrt%2816%2B9%29
d = 5 mi away from each other