SOLUTION: A car travels 70 mph for 3 hours, 0 mph for 1 hour, 50 mph for 1.5 hours, and 60 mph for 4 hours. what is its average speed over the entire trip?

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Question 807854: A car travels 70 mph for 3 hours, 0 mph for 1 hour, 50 mph for 1.5 hours, and 60 mph for 4 hours. what is its average speed over the entire trip?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
r*t=d
r=d/t
3*70=210
50*1.5=75
60*4-240

(210+75+240)/(3+1.5+4)=60.76 mph