SOLUTION: An express train travels 150 km in the same time that a freight train travels 100 km. If the express train goes 20km per hour faster than the freight train, find the rate of each.

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Question 387664: An express train travels 150 km in the same time that a freight train travels 100 km. If the express train goes 20km per hour faster than the freight train, find the rate of each. Tnx!
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rate*Time=Distance
R%2At=D
.
.
R%5Be%5D%2At=150
t=150%2FR%5Be%5D
.
.
R%5Bf%5D%2At=100
t=100%2FR%5Bf%5D
.
.
150%2FR%5Be%5D=100%2FR%5Bf%5D
100R%5Be%5D=150R%5Bf%5D
R%5Be%5D=%28150%2F100%29R%5Bf%5D
R%5Be%5D=%283%2F2%29R%5Bf%5D
.
.
R%5Be%5D=R%5Bf%5D%2B20
Substitute,
%283%2F2%29R%5Bf%5D=R%5Bf%5D%2B20
%281%2F2%29R%5Bf%5D=20
highlight%28R%5Bf%5D=40%29kph
.
.
R%5Be%5D=%283%2F2%29%2840%29
highlight%28R%5Be%5D=60%29kph