A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?  Choose the most appropriate option:  A) 18 days  B) 20 days  C) 24 days  D) 30 days  E) 34 days
Explanation:   2c = ¼ + 1/6 – 1/3 = 1/12   c = 1/24 =&gt; 24 days   Answer: 24 days
<result>C</result>
A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?