A and B can do a work in 12 days and 18 days, respectively. They worked for 4 days after which B was replaced by C and the remaining work was completed by A and C in the next 4 days. In how many days will C alone complete 50% of the same work?
A. 24
B. 18
C. 21
D. 36
Answer: Option B
This Question Belongs to Arithmetic Ability >> Time And Work
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