MathDB
Two Workers

Source:

February 1, 2009

Problem Statement

A A can do a piece of work in 9 9 days. B B is 50% 50\% more efficient than A A. The number of days it takes B B to do the same piece of work is: <spanclass=′latex−bold′>(A)</span> 1312<spanclass=′latex−bold′>(B)</span> 412<spanclass=′latex−bold′>(C)</span> 6<spanclass=′latex−bold′>(D)</span> 3<spanclass=′latex−bold′>(E)</span> none of these answers <span class='latex-bold'>(A)</span>\ 13\frac {1}{2} \qquad<span class='latex-bold'>(B)</span>\ 4\frac {1}{2} \qquad<span class='latex-bold'>(C)</span>\ 6 \qquad<span class='latex-bold'>(D)</span>\ 3 \qquad<span class='latex-bold'>(E)</span>\ \text{none of these answers}
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