A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 3 days. B can do the work alone in? Choose the correct choice from the following
A) 18	B) 12	C) 11	D) 19	E) 114
Suppose A, B and C take x, x/2 and x/3 respectively to finish the work.   Then, (1/x + 2/x + 3/x) = 1/3   6/x = 1/3 =&gt; x = 18   So, B takes 9 hours to finish the work.   18nswer: 18
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A take twice as much time as B or thrice as much time to finish a piece of work. Working together, they can finish the work in 3 days. B can do the work alone in?