SOLUTION: Tom drives at a constant speed of 60 mph for 6 hours and then at a constant speed of 40 mph for 4 hours. Find his average speed (in mph) for the 10 hours. A. 10 B. 20 C. 50 D. 5

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Question 252179: Tom drives at a constant speed of 60 mph for 6 hours and then at a constant speed of 40 mph for 4 hours. Find his average speed (in mph) for the 10 hours.
A. 10 B. 20 C. 50 D. 52 e 55 2/3
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
[(60*6)+(40*4)]/10=(360+160)/10=520/10=52 mph. is the average speed.
Aanswer D).