Homework Help Forum: 8th grade math

Posted by viv on Tuesday, October 20, 2009 at 11:37pm.

An airplane flies from New Orleans to Atlanta at a rate of 320mph. The airplane then returns at a rate of 280mph. The total travel time is 3 hours. What is the flying time from New Orleans to Atlanta?

• 8th grade math - raul, Tuesday, October 20, 2009 at 11:54pm

  2 hours 37 min and 30sec because 280*3=840 and 840/320=2.625 0.625*60=37.5 thats the time in min the .5 is 30 sec so its 2 hours 37 min and 30 sec hope this helps

  
  

• 8th grade math - Reiny, Wednesday, October 21, 2009 at 8:42am

  The distance either way is the same, let the distance be x miles so , since Time = Distance/Rate x/320 + x/280 = 3 solve to get x = 448 miles so time for first flight = 448/320 hrs = 1.4 hrs or 1 hour and 24 minutes check first flight = 448/320 = 1.4 second flight= 448/280 = 1.6 total time = 3 hrs.

  
  

Answer this Question

First Name:
School Subject:
Answer: