Question 41757
Compared to hours:
Jim's rate: (1/2)
Sue's rate: (3/4)
Tony's rate: (3/2)
Rate * Time = Work
{{{(t/2) + (3t/4) + (3t/2)= 1}}}
{{{4(t/2) + 4(3t/4) + 4(3t/2) = 1(4)}}}
{{{2t + 3t + 6t = 4}}}
{{{11t = 4}}}
{{{t = 4/11}}}
(4/11)(60) = 
about 22 minutes