Answer:
Step-by-step explanation:
Let's convert either m/s to km/s, or km to meters.
I'll convert km to meters and solve.
8 minutes and 20 seconds
There are 1,000 meters/kilometer. We can write that as a conversion factor: (1000m/km)
(10km)(1000m/km) = 10,000 meters
At 20m/s, we see that: (10,000m)/(20 m/s) = 500 seconds
(1 minute/60 seconds)
(500s)*(1m/60s) = 8 1/3 minutes, or 8 minutes and 20 seconds
