A, Band C can do a piece of work in 11 days, 45 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by Band C on alternate days?
Choose the correct choice from the following:
A) 7 days	B) 8 days	C) 9 days	D) 10 days	E) 11 days
(A+B)'s 1 day's work = 1/11+1/45 = 56/495   (A+9 days)'s 1 day's work = 1/11+1/55 = 6/55   work done in 2 day's = 56/495+6/55 =2/9   2/9th work done in 2 days   work done= 9/2*2= 
<gadget id="calculator">9/2*2</gadget>
<output>9</output>
9 days   ANSWER:9 days
<result>C</result>
A, Band C can do a piece of work in 11 days, 45 days and 55 days respectively, working alone. How soon can the work be done if A is assisted by Band C on alternate days?