Question

'A' and 'B' can finish a task together in 30 days. They worked together for 18 days and then left. The rest of the task was done by 'C' in 12 days. How many days will 'C' alone take to complete 75% of the total task?

A 12.5 days
B 22.5 days
C 42.4 days
D 55.4 days
E None of these
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