A can do a piece of work in 3days of 8 hours each and B alone can do it in 4 days of 9 hours each.how long will they take it to do working together
7 1/5 hours a day?	Choose the correct choice from the following answers.
A) 3 days
B) 2 days
C) 5 days
D) 7 days
E) 4 days
A's work per hour=1/24   B's work per hour=1/36   A &amp; B's work per hour together=(1/24)+(1/36)=5/72   so A &amp; B together complete the work in 72/5 hours...   if they work 7 1/5=36/5 hours a day,   it will take  (72/5)/(36/5)= 
<gadget id="calculator"> (72/5)/(36/5)</gadget>
<output>2</output>
2 days...   ANSWER:2 days   ANSWER:2 days
<result>B</result>
A can do a piece of work in 3days of 8 hours each and B alone can do it in 4 days of 9 hours each.how long will they take it to do working together
7 1/5 hours a day?