A can do a piece of work in 4 hours . A and C together can do it in just 2 hours, while B and C together need 3 hours to finish the same work. B alone can complete the work in --- hours. Pick one
A) 12 hours  B) 6 hours  C) 8 hours  D) 10 hours  E) 4 hours
Explanation :   Work done by 12 hours in 1 hour = 1/4   Work done by B and C in 1 hour = 1/3   Work done by 12 hours and C in 1 hour = 1/2   Work done by 12 hours,B and C in 1 hour = 1/4+1/3 = 7/12   Work done by B in 1 hour = 7/12 – 1/2 = 1/12 =&gt; B alone can complete the work in 12 hours   12 hoursnswer : Option 12 hours
<result>A</result>
A can do a piece of work in 4 hours . A and C together can do it in just 2 hours, while B and C together need 3 hours to finish the same work. B alone can complete the work in --- hours.