Question 169008
you're on the right track, but how can it take longer than the fastest man?


if it takes x days, then Al's portion is x/10 and Ben's portion is x/12


together they do the whole job __ x/10 + x/12 = 1


multiplying by 60 __ 6x + 5x = 60 __ 11x = 60 __ x = 60/11


what you found was one day's portion of the job