Answer:
She must run 59 min to run 11.8 km.
Explanation:
Hi there!
First let's convert mi/h into km/min:
7.4 mi/h · (1.61 km /1 mi) · (1 h / 60 min) = 0.20 km/min (notice how the units mi and h cancel).
The runner runs at 0.20 km/ min, i.e., every minute she travels 0.20 km.
If 0.20 km are traveled in 1 min, then 11.8 km will be traveled in:
11.8 km / 0.20 km/min = 59 min
She must run 59 min to run 11.8 km.
