SOLUTION: A family is going on a trip. If they travel at 65 mph for one hour, and then their speed increases to 75mphfor 45 minutes, and then the speed decreases to 65mph for the next 45 min

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Question 408142: A family is going on a trip. If they travel at 65 mph for one hour, and then their speed increases to 75mphfor 45 minutes, and then the speed decreases to 65mph for the next 45 minutes how many
miles would they have driven?
Found 2 solutions by ewatrrr, josmiceli:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

D = r*t  |Note* units must be consistent:  45/60 = 3/4 hr OR .75hr

 65mph*1hr + 75mph*.75hr + 65mph*.75hr = 65mi + 56.25mi + 48.75 = 170mi

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
65%2A1 (miles/hour)x(hour) + 75%2A%283%2F4%29 (miles/hour)x(hours) + 65%2A%283%2F4%29 miles/hour)x(hours)
65+%2B+%283%2F4%29%2A%2875+%2B+65%29
65+%2B+%283%2F4%29%2A140
65+%2B+105
170
They drove 170 miles