SOLUTION: Two planes leave an airport. One flying north at 480 mph and the other flying south at 520 mph. How long will it take for the planes to be 3000 miles apart? I know that I have to u

Question 430862: Two planes leave an airport. One flying north at 480 mph and the other flying south at 520 mph. How long will it take for the planes to be 3000 miles apart? I know that I have to use the distance formula I just don't know how to set up the problem please help!
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
North bound 480 mph
south bound 520 mph
..
opposite directions
so add up speed
520+480=1000 mph
distance = 3000 miles
t= d/r
t=3000/1000
t = 3 hours
RELATED QUESTIONS
Two planes leave an airport at 8 a.m., one flying north at 480 km/h and the other flying... (answered by drj)

two planes leave an airport at the same time, one flying north at 450 mph and the other... (answered by Cromlix)

if two planes leave an airport at the same time with one flying west at 680 mph and the... (answered by Edwin McCravy)

if two planes leave an airport at the same time with one flying west at 570 mph and the... (answered by jndarrell)

Two planes leave an airport at the same time. One is flying south at 450 mph, and the (answered by checkley79)

two planes leave an airport at the same time and fly in opposite directions. one of the... (answered by drj)

if two planes leave an airport at the same time with one flying west at 530 miles per... (answered by rfer)

If two planes leave an airport at the same time with one flying west at 330 miles per... (answered by 500001122)

Two jets leave an airport at noon, one flying north at r mi/h, and the other flying south (answered by Fombitz)