SOLUTION: if john travel 10 miles at 5 miles per hour,12 miles at 4 miles per hour, and 18 in three hours, what was his average speed for the trip
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Question 293216: if john travel 10 miles at 5 miles per hour,12 miles at 4 miles per hour, and 18 in three hours, what was his average speed for the trip Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! Notice: It is 18 in three hours for 6 mph
It is not (5+4+6)/3=15/3=5 mph
d=r*t
10=5*2
12=4*3
18=6*3
average r=d/t
(10+12+18)/(2+3+3)=40/8=5 mph
