Question: A 1 0 m p h school zone is in effect from 7 : 0 0 - 8 : 3 0 A . M .

A 10mph school zone is in effect from 7:00-8:30 A.M. Traffic measurements,
taken on a typical working day, showed that at 8:00 A.M., the conditions presented
in the following figure prevailed. How long did it take for the 3-miles platoon to
disappear, and what was the speed if the shock wave that commenced at the
moment when the platoon dissipated completely?
A 1 0 m p h school zone is in effect from 7 : 0 0

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