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Two airplanes left an airport at the same time traveling in opposite directions. One travels at a speed of 190 miles per hour. The other travels 210 miles per hour. How long will it take for the planes
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3 votes
Two airplanes left an airport at the same time traveling in opposite directions. One travels at a speed of 190 miles per hour. The other travels 210 miles per hour. How long will it take for the planes to be 2000 miles apart?

User Ignitor
by
8.2k points

2 Answers

3 votes
plane 1s speed function is a = 190t and 2 is b = -210t
lets times each by 10.
1900
-2100
1900-(-2100)
4000
now 5
950
-1050
950-(-1050) 2000
the answer would be 5 hours when they are at least 2000 mi apart
User Morels
by
9.3k points
4 votes
190x + 210x = 2000
400x = 2000 <-- Combine like terms

x = 5

In 5 hours they will separated by 2000 miles.
User Irfan DANISH
by
8.3k points
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