On a highway trip, Joseph drives the first 25 miles at 55 mph, and the next 15 miles at 70 mph. What is his average speed for this trip?
Added by Juana P.
Step 1
For the first 25 miles at 55 mph, he spent 25/55 = 0.45 hours (or about 27 minutes). For the next 15 miles at 70 mph, he spent 15/70 = 0.21 hours (or about 13 minutes). Show more…
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