Question 144970
tbone can do 1/4 car per hour
texas can do 1/6 car per hour

together they can do {{{1/4 + 1/6}}} per hour
{{{3/12 + 2/12}}} = {{{5/12}}} per hour

How many hours to do a whole car

5/12 * t = 1
t = 12/5 = 2.5 hours