1. The scale on a map is 1 inch to 5 miles. If a lake on the map is 2.5 inches long, how many miles long is the lake? 2. If Molly can mow a lawn in 3 hours and her little brother can do it in 6 hours, how many hours will it take to mow the lawn while working together? Using Working Together Formula ( 1/a +1/b = 1/T) 3. Paul has to put shingles on a roof. A brand new construction worker takes 12 hours to do it alone. When Paul asks the new worker to help him, they can do the job in 2 hours less than it takes Paul to do it alone. How many hours does it take Paul to do the job alone? Using Working Together Formula ( 1/a +1/b = 1/T)