Asked by Neil

hi can you help me with this problem please, thank you.-----------------

If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
Answered by MathMate
See:
http://www.jiskha.com/display.cgi?id=1275952764
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