Question

A can complete a work in  18 days , B in  24 days , and C in  36 days . A starts the work alone and works for  4 days . Then B joins him, and after  3 more days , C also joins. How many days will they take to complete the work from the beginning?

A 10 (8/7) days
B 10 (8/9) days
C 11 (2/9) days
D 15 (8/9) days
E None of these
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