Answer:
It will only take an hour to accomplish mowing the lawn.
Step-by-step explanation:
Identify the Given: 2 Hour for his father and Three hours for his father.
What should the operation be: They are both helping each other to shorten the amount of time they will spend in their task. Probably, it should be subtraction.
Solution: Simply find its difference.
3 - 2 = 1
