AP ICET 2014

Question 100

Three persons A, B, C together can complete a work in 8 days where as A alone requires 24 days to complete the same work. The number of days-required for B and C together to complete the same work is

Solution

Let the total amount of work be 24 units. 
Hence, by given data, we can say that A alone completes 1 unit per day and A,B,C all together do 3 units of work per day.
Hence, we can say that B and C together do 2 units of work per day.

Thus, the amount of time required by only B and C together to do entire work = 24/2 = 12 days


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