SOLUTION: David travels for 6 hours at a rate of 50 mph. his return trip takes him 7.5 hrs. what is his average speed for the whole trip?

Question 194340: David travels for 6 hours at a rate of 50 mph. his return trip takes him 7.5 hrs. what is his average speed for the whole trip?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
David travels for 6 hours at a rate of 50 mph.
his return trip takes him 7.5 hrs.
what is his average speed for the whole trip?
:
Find the one-way distance (dist = time * speed):
6*50 = 300 mi
:
The round trip dist: 2 * 300 = 600 mi
:
The total time for the round trip: 6 + 7.5 = 13.5 hrs
:
Average speed =
Av speed = = 44.44 mph
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