<pre>
A boy, a girl and a dog go for a 10 mile walk.  The boy and girl can
walk at 2 mph and the dog can trot at 4 mph.  They also have a bicycle
which only one of them (including the dog====) can use at a time.  When
====
riding, the boy and girl can travel at 12 mph while the dog can pedal
at 16 mph.  What is the shortest time in which all three can complete
the trip?

*BicycleAnswer
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