A and B can do a piece of work in 12 days and 16 days respectively. Both work for 3 days and then A goes away. Find how long will B take to complete the remaining work? Choose the correct choice from the following options
A) 6  B) 7  C) 5  D) 9  E) 3
3/12 + (3 + x)/16 = 1   x = 9 days   Answer: 9
<result>D</result>
A and B can do a piece of work in 12 days and 16 days respectively. Both work for 3 days and then A goes away. Find how long will B take to complete the remaining work?