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December 21, 2014

December 21, 2014

Posted by **Nabil** on Monday, October 10, 2011 at 6:37am.

one travels west at 40 mph.

the other goes north at 30 mph.

When will they be 400 miles apart?

- algebra -
**tchrwill**, Monday, October 10, 2011 at 9:34am(30t)^2 + (40t)^2 = 400^2

- algebra -
**T U BHARGAV**, Monday, October 10, 2011 at 11:30pm30t+40t=400

70t=400

t= 400/70

=5.71hrs

After 5.71hrs they will be at 400miles apart.

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