Question 162424
 If two planes leave the same airport at 1:00 PM, how many miles apart will they be at 3:00 PM if one travels directly north at 150 mph and the other travels directly west at 200 mph? 
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Draw the picture: a north leg of length 2*150", and west leg of length 2*200

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Use Pythagoras to find the distance between them:
d = sqrt[300^2 + 400^2]
d = sqrt[250,000]
d = 500 miles
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Cheers,
Stan H.
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A. 50 miles
B. 100 miles
C. 500 miles
D. 700 miles
E. 1,000 miles 
I know the answer is C; but, how do I get to the answer