Freeflows
Runner's Average Speed
Melanie ran at $ 5 $ m/s for $ 400 $ meters, then ran at $ 4 $ m/s for the next $ 800 $ meters, and finally ran at $ 8 $ m/s for the final $ 400 $ meters. What was her average speed, in meters per second, for the $ 1600 $ meter run? Express your answer as an improper fraction.
- 1
- 2
- 3
- +
- 4
- 5
- 6
- -
- 7
- 8
- 9
- $\frac{a}{b}$
- .
- 0
- =
- %
- $a^n$
- $a^{\circ}$
- $a_n$
- $\sqrt{}$
- $\sqrt[n]{}$
- $\pi$
- $\ln{}$
- $\log$
- $\theta$
- $\sin{}$
- $\cos{}$
- $\tan{}$
- $($
- $)$
- $[$
- $]$
- $\cap$
- $\cup$
- $,$
- $\infty$