Problema Solution
Working together, Rosemary and her bestfriend can do the job in 8 hours. If either had to do it alone, it would take her bestfriend 2 hours longer than Rosemary. How long would it take a person working alone?
Answer provided by our tutors
The time of Rosemary alone: x
The time of Rosemary's bestfriend alone: x+2
So the equation is
1/x + 1/(x+2) = 1/8
So
x = 15.06
So
The time of Rosemary alone: 15.06 hours
The time of Rosemary's bestfriend alone: 17.06 hours