Posted by viv on Tuesday, October 20, 2009 at 11:37pm.
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
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.
Related Questions
8th grade math - An airplane flies from New Orleans to Atlanta at a rate of ...
Algebra - This is soooo confusing! An airplane flies from New Orleans, Louisiana...
Math - Scott can travel from Rochester, N.Y., to New York City by bus, train, ...
physics - An airplane starts from rest at the end of a runway and accelerates at...
Math - At an airport, a flight controller is in a tower 45m above the ground. ...
Airplane & Radar - (Airplane & Radar) An airplane is flying (...
algebra 1 - a model airplane flies 18 feet in 2 seconds. What is the airplane&#...
math - When an airplane flies with a given wind, it can travel 3000 km in 5hrs. ...
Calculus-rates - 1.) A man 6 ft tall walks at a rate of 5 ft per sec. from a ...
Math - An airplane has a speed of 400 km/h with no wind. The airplane flies 2140...
For Further Reading
