Question 806014: A commercial jet took off from Kansas City for San Francisco, a distance of 2550 km, at a speed of 800 km/h. At the same time a private jet, traveling at 900 km/h, left San Francisco for Kansas City. How long after takeoff will the jets pass each other?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A commercial jet took off from Kansas City for San Francisco, a distance of 2550 km, at a speed of 800 km/h. At the same time a private jet, traveling at 900 km/h, left San Francisco for Kansas City. How long after takeoff will the jets pass each other?
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KC to SF DATA:
rate = 800 km/h ; time = t hrs ; distance = 800t km
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SF to KC DATA:
rate = 900 km/h ; time = t hrs; distance = 900 km
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Equation::
dist + dist = 2550 km
800t + 900t = 2550
1700t = 2550
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t = 1.5 hrs (time till they meet)
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Cheers,
Stan H.
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