1. A father and his son can complete a piece of work in 4 days, while the father alone can complete it in 6 days. Both of them work for 2 days, then the father had to leave. How long will the son take to complete the remaining work?
(a) 8 days (b) 9 days (c) 6 days (d) 4 days
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c is the answer . hope it helps please help me to be the brainliest
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