Now Anil Paints in 12 Days Barun paints in 16 Days Now together Arun , Barun and Chandu painted in 6 Days Now let total work be W Now each worked for 6 days So Anil's work = 0.5W Barun's work = $ {6\W}/16 = {3\W}/8 $ Therefore Charu's work = $ \W/2 - {3\W}/8 = \W/8 $ Therefore proportion of Charu = $24000/8$ = 3000