E and F can do a work in 10 days. If E alone can do it in 30 days, F alone can do it in _____ days.A. 15B. 20C. 25D. 18

E and F can do a work in 10 days. If E alone can do it in 30 days, F a

1.	E and F can do a work in 10 days. If E alone can do it in 30 days, F alone can do it in _____ days.A. 15B. 20C. 25D. 18
A.	A
B.	C
C.	D
D.	B
Answer» B. C

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E and F can do a work in 10 days. If E alone can do it in 30 days, F alone can do it in _____ days.A. 15B. 20C. 25D. 18

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