342  Choose the correct choice from the following.
A) 9
B) 8
C) 6
D) 5
E) 4
One day's work of A and B = 1/9 + 1/8 = (2+1)/18   = 1/6 So, the time taken to complete the work is 6 days.   Answer: 6
<result>C</result>
342