west at 50mph. how long will it take for them to be 120 miles apart?
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Hour and 20 minutes because you add the speeds together to get 90 miles per hour and 120 miles is 1.3 of 90 so it will be 1 hour and 20 minutes.
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80 minutes
They're traveling in opposite directions at a total of 90 mph, so they will be 120 miles apart in 120/90 hours, which is 4/3 hours, which is 80 minutes.
They're traveling in opposite directions at a total of 90 mph, so they will be 120 miles apart in 120/90 hours, which is 4/3 hours, which is 80 minutes.