SOLUTION: How many seconds will it take for a train 300 meters long travelling at 100 km/hr to pass a man jogging at 10 km/hr in the same direction?

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Question 318495: How many seconds will it take for a train 300 meters long travelling at 100 km/hr to pass a man jogging at 10 km/hr in the same direction?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rate*Time=Distance
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Let's assume that it takes time T for the train to pass the man.
The train has to travel 300m (0.3 km) plus the distance that the jogger covers in T.
Rt%2AT=300%2BRj%2AT
%28Rt-Rj%29T=0.300
%28100-10%29T=0.300
T=0.3%2F90=0.003333 hr
1 hr=3600 sec
T=0.003333%283600%29=12 sec
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It takes the train 12 seconds to pass the jogger.