SOLUTION: A train running at 30 kph is overtaken by a car 4 hours after the train started moving. If the car started 1 hour after the train left, what is the speed of the car? (ASAP)

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Question 329450: A train running at 30 kph is overtaken by a car 4 hours after the train started moving. If the car started 1 hour after the train left, what is the speed of the car?
(ASAP)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Rate*Time=Distance
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When the car starts, the train is 30 km (1 hr) ahead.
Dt=30%2B30t
Dc=Rc%2At
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When Dt=Dc, then t=3.
Dt=Dc
30%2B30t=Rc%2At
30%2B30%283%29=Rc%2A%283%29
Rc=10%2B30
Rc=40kph