SOLUTION: A plane leaves Charlotte at 9:00 AM and flies north at 400 knots. At the same time, another plane flies south from Charlotte at 250 knots. How long is it before they are 1000 nauti

Question 1196175: A plane leaves Charlotte at 9:00 AM and flies north at 400 knots. At the same time, another plane flies south from Charlotte at 250 knots. How long is it before they are 1000 nautical miles apart?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A plane leaves Charlotte at 9:00 AM and flies north at 400 knots. At- the same time, another plane flies south from Charlotte at 250 knots. How long is it before they are 1000 nautical miles apart?
==========================
The speeds are added when going in opposite directions ---> 650 knots
--------------------
d = r*t
t = d/r = 1000/650 hours
Answer by ikleyn(52879) (Show Source): You can put this solution on YOUR website!
.

In this problem, pointing the departure time is excessive and unnecessary information.

When writing math problems, it is not customary to give unnecessary information.
Otherwise, it makes the impression of unprofessionalism.

In Math, it is only possible, when you write a joking problem, which is not the case with your post.

RELATED QUESTIONS
A plane leaves an airport flying north at 800 km/h. At the same time another plane leaves (answered by JulietG)
A plane leaves an airport flying north at 800km/h. At the same time another plane leaves... (answered by Boreal)
Write an equation and solve. A plane flies west from Wichita at 350 knots, at the same... (answered by Alan3354)
A cargo plane heading east at 240 kph leaves Honolulu airport at 9:30 AM. A passenger... (answered by Theo)
A planes flies south at 192mph. Two hours later another plane leaves at 960mph. when will (answered by ewatrrr)
an aeroplane leaves an airport and flies due north at a speed of 1800 km/hr. at the same... (answered by mananth)
A private airplane leaves an airport and flies due south at 192 km/h. Two hours later a... (answered by ptaylor)
a private airplane leaves an airport and flies due south at 192km/h. Two hours later a... (answered by mananth)
A private airplan leaves an airport and flies due south at 192 km/h. Two hours later a... (answered by Alan3354)