Verified Answer :

nobrains

Unit rate means how many per quantity of 1.
So in this case the number of miles per 1 hour.
180 miles / 3 hours

Divide 180 by 3,
60 miles / hour
60 miles per hour.

Here you are trying to find mph.

To do that, you divide each side by 3. Why? Because you are trying to find per hour.
180 divided by 3 is 60.

Therefore, we have 60 miles in 1 hr as the unit rate.

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