Posted by Dakota S on Sunday, September 12, 2010 at 9:12pm.
d1 = 35 mi/hr * 0.5 hr = 17.5 mi,
d2 = 60 mi/hr * 2 hr = 120 mi,
d3 = 25 mi/hr * 1/6 hr = 4.17 mi.
d = 17.5 + 120 + 4.17 = 141.67 miles,
t = 0.5 + 2.0 + 1/6 = 2.67 hrs,
Vavg = d / t = 141.67/2.67 = 53.13 mi/hr.
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