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- A works twice as fast as B.
Question 1:
A works twice as fast as B. if B can complete a work in 12 days independently,the number of days in which A and B can together finish the work is:
A. 4 days
Feedback That is, if b alone can finish the work in 12 days,
A alone can finish the work in 6 days.
If A can complete a work in x days and B can complete the same work in y days, then, both of them together can complete the work in x y/ x+ y days.
A and B can together finish the work in 6 × 12/18 days = 4 days.
A alone can finish the work in 6 days.
If A can complete a work in x days and B can complete the same work in y days, then, both of them together can complete the work in x y/ x+ y days.
A and B can together finish the work in 6 × 12/18 days = 4 days.
B. 6 days
C. 8 days
D. 18 days
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