SOLUTION: Two planes that are initially 800 mi apart are flying directly toward each other. One flies at 250 mph and the other at 150 mph. How long will it be before they meet?

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Question 777011: Two planes that are initially 800 mi apart are flying directly toward each other. One flies at 250 mph and the other at 150 mph. How long will it be before they
meet?
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
Two planes that are initially 800 mi apart are flying directly toward each other. One flies at 250 mph and the other at 150 mph. How long will it be before they
meet?
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Moving opposite directions, the speeds are added.

Answer by josgarithmetic(39630) (Show Source):
You can put this solution on YOUR website!
When will the sum of their traveled distances be 800?

d = 800 miles
R = 250 mph
r = 150 mph
h = time until meet in hours

Fast plane distance
Slow plane distance

When meet,

Substitute the values to finish.