SOLUTION: two trains running in opposite direction with speeds 30 km/hr and 50km/hr crosees each other in 15 sec.what is the length of the fastest train?

Question 477166: two trains running in opposite direction with speeds 30 km/hr and 50km/hr crosees each other in 15 sec.what is the length of the fastest train?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
two trains running in opposite direction with speeds 30 km/hr and 50km/hr cross each other in 15 sec. what is the length of the fastest train?
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Combined speed = 80 (km/hr)(hr/3600 sec)(1000 m/km) = 22.22 meters.sec
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15(22.22) = 333.33 meters in 15 seconds
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Equation:
The ratio of the trains speeds is 5:3
5x + 3x = 333.33
8x = 333.33
x = 41.666.
5x = 208.33 meters (length of the faster train)
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Cheers,
Stan H.
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