A is twice as good a workman as B and they took 5 days together to do the work B alone can do it in? Choose the correct choice:
A) 15 days B) 88 days C) 21 days D) 11 days E) 13 days
WC = 2:1   2x + x = 1/5   x = 1/15 =&gt; 15 days   15 daysnswer: 15 days
<result>A</result>
A is twice as good a workman as B and they took 5 days together to do the work B alone can do it in?