Question

Exercise 3. A car travels the first half of a 120 mile trip at 30 miles per hour. At what speed would the next 60 miles need to be for the overall average speed of the entire trip to be 65 miles per hour?

Answer 1

120 mi / 30 mph = 4 hours

Answer 2

180 total miles / (4 + x hrs) = 65 mph

Answer 3

hm.. how do i solve that?

Answer 4

the solution is negative

Answer 5

No.

It's 60 mi / 30 mph = 2 hours

120 / (2 +x) = 65

Answer 6

ok i misread the problem

Answer 7

Although, I still get negative results. Hmmm

Answer 8

it looks like a badly made problem to me

Answer 9

hmm, ok. thanks.