4Q. Abhay, Pradeep & chandu can complete a work separately in 24, 36 & 48 days respectively. They started work together but Chandu left after 4 days of start and Abhay left 3 days before the completion of the work. In how many days will the work be completed?

a.) 22 Days
b.) 18 Days
c.) 15 Days
d.) 24 Days

• Let the work is completed in 'x' days.
  Then, (x-3)/24 + X/36 + 4/48 = 1
  Solving, we get X=15
  So, option c) is correct.
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