A takes 10 days less than the time taken by B to finish a piece of work. If both A and B can do it in 12 days, then the time taken by B alone to finish the work is = ?

A takes 10 days less than the time taken by B to finish a piece of wor

1.	A takes 10 days less than the time taken by B to finish a piece of work. If both A and B can do it in 12 days, then the time taken by B alone to finish the work is = ?
A.	0 days
B.	7 days
C.	0 days
D.	5 days
Answer» B. 7 days