SOLUTION: A family drives 123 miles in 2 hours, then goes another 4 miles in 15 minutes, then travels another 191 miles in 3 3/4 hours. What was their average speed to the nearest tenth of a

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Question 1147914: A family drives 123 miles in 2 hours, then goes another 4 miles in 15 minutes, then travels another 191 miles in 3 3/4 hours. What was their average speed to the nearest tenth of a mile per hour?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Total Miles of Distance
123%2B4%2B191
318

Total Hours of Time
2%2B1%2F4%2B3%263%2F4
cross%285%29

Average speed is total miles divided by total time.

Answer by ikleyn(52812) About Me  (Show Source):
You can put this solution on YOUR website!
.

            The solution by @josgarithmetic is  WRONG,

            so I came to bring the correct solution. 


Total Miles of Distance

    123 + 4 + 191 = 318



Total Hours of Time

    2 + 1%2F4 + 33%2F4 = 6 hours.



Average speed is total miles divided by total time  318%2F6 = 53 miles per hour.    ANSWER