Answer: 2 lawns per hour.
Step-by-step explanation:
Given : Number of lawns = 14
Hours taken to mow 14 lawns = 7 hours
The rate is the ratio of two quantities with different units.
Here, rate of mowing= 14 lawn per 7 hours.
Rate are generally expressed as unit rates (ratio of two quantities in which second term is 1).
Now, The unit rate is given by :-
[tex]\text{Unit rate}=\dfrac{\text{Number of lawns}}{\text{Number of hours taken to mow them}}\\\\\Rightarrow\ \text{Unit rate}=\dfrac{14}{7}\\\\\Rightarrow\ \text{Unit rate}=2\text{ lawn per hour}[/tex]
Therefore , the unit rate = 2 lawns per hour.
