SOLUTION: a train at an average speed of 100km/h covers a certain distance in 3 hours 36min.At what average speed must the train travel to cover the same distance in 2hours 30min

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Question 1031477: a train at an average speed of 100km/h covers a certain distance in 3 hours 36min.At what average speed must the train travel to cover the same distance in 2hours 30min
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
R%2At=D
Convert to common units of time,
T%5B1%5D=3%2A60%2B36=180%2B36=216
T%5B2%5D=2%2A60%2B30=120%2B30=150
So then,
R%5B1%5DT%5B1%5D=R%5B2%5DT%5B2%5D
100%2A216=R%5B2%5D%2A150
R%5B2%5D=144
144 km/h