A can do a piece of work in 6days of 9 hours each and B alone can do it in 12 days of 9 hours each.how long will they take it to do working together
4 1/2 hours a day?
Choose the correct choice from the following choices:
A) 8 days B) 9 days C) 7 days D) 6 days E) 10 days
A's work per hour=1/54   B's work per hour=1/108   A &amp; B's work per hour together=(1/54)+(1/108)=3/108=1/36   so A &amp; B together complete the work in 36 hours...   if they work 4 1/2=9/2 hours a day,   it will take  (36)/(9/2)= 
<gadget id="calculator"> (36)/(9/2)</gadget>
<output>8</output>
8 days...   8 daysNSWER: 8 days
<result>A</result>
A can do a piece of work in 6days of 9 hours each and B alone can do it in 12 days of 9 hours each.how long will they take it to do working together
4 1/2 hours a day?