SOLUTION: Two planes leave at the same time. One flies north at 350 miles per hour and the other plane heads south at 420 miles per hour. In how many hours will they be 1925 miles apart?
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Question 592769: Two planes leave at the same time. One flies north at 350 miles per hour and the other plane heads south at 420 miles per hour. In how many hours will they be 1925 miles apart?
I would like to know the formulas, I don't want just the answer. I would like to learn how to do more problems like this in the future. Thank You! Answer by solver91311(24713) (Show Source):
The basic formula is Distance equals Rate times Time, from which you can derive either Rate equals Distance divided by Time or Time equals Distance divided by Rate.
In your case, you have two objects moving in exact opposite directions. Therefore they are moving apart at the sum of their rates. Divide the given distance by the sum of the two rates.
John
My calculator said it, I believe it, that settles it
