SOLUTION: Train A leaves a station traveling @ 20mph. 2 hrs later, Train B leaves the same station traveling @ 30mph in the same direction. how long does it take for train B to catch up wit

Question 503049: Train A leaves a station traveling @ 20mph. 2 hrs later, Train B leaves the same station traveling @ 30mph in the same direction. how long does it take for train B to catch up with train A ?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Train A = 20 mph
Train B = 30 mph
Train A starts 2 hours early
Train A will have covered 40 miles before Train B starts from station
catch up distance= 40 miles
catch up speed = 30 -20 mph
catch up speed = 10 mph
Catchup time = catchup distance/catch up speed
catch up time= 40 / 10
catch up time= 4 hours

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