SOLUTION: Wendy took a trip from one city to another, a distance of 210 mi. She traveled part of the way by bus, which arrived at the train station just in time for Wendy to complete her jou

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Question 996217: Wendy took a trip from one city to another, a distance of 210 mi. She traveled part of the way by bus, which arrived at the train station just in time for Wendy to complete her journey by train. The bus averaged 40 mi/h, and the train averaged 110 mi/h. The entire trip took
3
1
2
h.
How long did Wendy spend on the train?

Answer by josgarithmetic(39615) About Me  (Show Source):
You can put this solution on YOUR website!
RT=D uniform travel rate rule relates rate, time, distance.

           speed     time   distance
BUS         40        ()     ()
TRAIN      110        ()     ()
Total                       210

You could either pick variables for each of the missing times or pick variables for each missing distance, but maybe you need more information.
           speed     time   distance
BUS         40        ()     (x)
TRAIN      110        ()     (210-x)
Total                       210

The choices listed are strange; You need more information.
-
MAYBE you meant total time was 312 hours?