Problema Solution
Moji can do a job in 1 hour. Demi can do the same job in 2 hours and Nike can do the job in 3 hours. How long does it take them to do the job working together?
Answer provided by our tutors
work rate of moji = 1
work rate of demi = 1/2
work rate of nike = 1/3
let they take x hours to complete the work together.
so x + x/2 + x/3 = 1
=> x(1+1/2+1/3) = 1
=> x = 6/11 hours = 0.54 hours
0.54 * 60 = 32.73 min ans