Question 644193
Tom Whig traveled 220 miles east of St Louis. For most of the trip he averaged 60 MPH, but for one period of time he was slowed to 10mph due to major accident. If the total time of the travel was 7 hours, how many miles did he drive at the reduced speed?
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Says he drove at 10 mi/hr, not 50.
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d = r*t
t = time going 60, 7-t = time going 10 mi/hr
220 = 60t + 10(7-t)
220 = 50t + 70
t = 3 hrs @ 60 mi/hr
--> 4 hours at 10 mi/hr