Posted by Lisa on Tuesday, February 2, 2010 at 6:56pm.
Assume the truck is standing still, then she must travel a total distance of (14+30)ft in 6 seconds
speed = distance/time = 44 ft/6 sec
44 ft/6 sec = 440 ft/60 sec
= 440 ft/min = 26400 ft/hr
= 5 mi/hr
So she must travel 5 mph faster than the truck, which was going at 50 mph
So she will have to travel 60 mph
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