If two cowboys leave a ranch at 9: 00 am, how far apart will they be at 11: 00 am if one travels directly north at 20 mph and the other travels directly west at 15 miles mph?
a)25 miles
b)35 miles
c)70 miles
d)50 miles
e)400 miles

They both traveled for two hours, so you must multiply both speeds by 2 and then add those together to get your answer. You multiply by 2 because there speed is by miles per hour, and you have 2 hours. You add the two products together because you're trying to find the distance between the two cowboys.
So, here's the actual math:
20x2=40
15x2=30
40+30=70

There are 70 miles between the two cowboys two hours after they part. So, your answer is C.

The answer is A

if you read the question carefully and draw a diagram, you find out the two cowboys form a right angle.

you then use the Pythagorean theorem c^2 =a^2 +b^2

c^2 =20^2+15^

c^2 =625

square root both sides
c=25

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