A and B together can do the work in X days. A takes 12 days less than B to complete the whole. If time taken by A to complete the whole working alone is 9 days, then find X.

A and B together can do the work in X days. A takes 12 days less than

1.	A and B together can do the work in X days. A takes 12 days less than B to complete the whole. If time taken by A to complete the whole working alone is 9 days, then find X.
A.	6.3 days
B.	7 days
C.	5 days
D.	5.5 days
E.	7.2 days
Answer» B. 7 days

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A and B together can do the work in X days. A takes 12 days less than B to complete the whole. If time taken by A to complete the whole working alone is 9 days, then find X.

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