A and B can do a job together in 7 days. A is $$1\frac{3}{4}$$times as efficient as B. The same job can be done by A alone in :

A and B can do a job together in 7 days. A is $$1\frac{3}{4}$$times as

1.	A and B can do a job together in 7 days. A is $$1\frac{3}{4}$$times as efficient as B. The same job can be done by A alone in :
A.	$9\frac{1}{3}$$days
B.	1 days
C.	$12\frac{1}{4}$$days
D.	$16\frac{1}{3}$$days
Answer» C. $12\frac{1}{4}$$days