SOLUTION: "How far can an airplane fly from its base, and yet return within 3 hours, if it's outgoing speed is 600 kilometers per hour and it's returning speed is 400 kilometers per hour?" C

Question 1031904: "How far can an airplane fly from its base, and yet return within 3 hours, if it's outgoing speed is 600 kilometers per hour and it's returning speed is 400 kilometers per hour?" Can you help me with this? I don't understand it at all.
Found 2 solutions by addingup, MathTherapy:
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
Convert to minutes:
3*60 = 180 minutes
and 600/400 = 1.5 It takes 1.5 times longer coming back
x+1.5x= 180
2.5x = 180
x = 72 minutes is the fast speed
and
72*1.5 = 108 is the fast speed
72+108=180 minutes and 180/60 = 3 hours of flight total.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

"How far can an airplane fly from its base, and yet return within 3 hours, if it's outgoing speed is 600 kilometers per hour and it's returning speed is 400 kilometers per hour?" Can you help me with this? I don't understand it at all.

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