Two men A and B working together complete a piece of work which it would have taken them 30 and 40 days respectively to complete if they worked separately. If they received a payment of ` 21,000, B's share is

Two men A and B working together complete a piece of work which it wou

1.	Two men A and B working together complete a piece of work which it would have taken them 30 and 40 days respectively to complete if they worked separately. If they received a payment of ` 21,000, B's share is
A.	8000
B.	12000
C.	9000
D.	None of these
Answer» D. None of these