Answer:
Jeniffer can mow 3 lawns in an hour.
Explanation:
If It takes Jennifer 20 minutes to mow the lawn. We are also given the time she spends mowing lawns. This is 1 hour.
For our solution to be correct, we will have to first of all convert 1 hour to minutes.
1 hour = 60 minutes.
Jeniffer should be able to mow 60 / 20 lawns in an hour. This will be 3 lawns in an hour.