SOLUTION: one plane can travel 20 miles per hour faster then another. one of them goes 285 mile in the same time it takes the other 255 miles. what are the speeds of the two panes

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Question 832097: one plane can travel 20 miles per hour faster then another. one of them goes 285 mile in the same time it takes the other 255 miles. what are the speeds of the two panes
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
___________speed_____________time_____________distance
Fast_______r+120______________t________________285
Slow________r_________________t________________255


R*T=D Rate Time Distance.

Fast plane has equation for t, t=285%2F%28r%2B120%29
Slow plane has equation for t, t=255%2Fr
t is the same for BOTH equations, and therefore we equate the two expressions for t.

285%2F%28r%2B120%29=255%2Fr
%28r%2B120%29%2F285=r%2F255
255%28r%2B120%29=r%2A285
255r%2B30600=285r
30r=30600
highlight%28r=1020%29 mph

Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!
one plane can travel 20 miles per hour faster then another. one of them goes 285 mile in the same time it takes the other 255 miles. what are the speeds of the two panes


Slower plane's speed: highlight_green%28170%29 mph

Faster plane's speed: highlight_green%28190%29 mph

You can do the check!! 



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