alleryStart learning →A works twice as fast as B. Together they finish in 12 days. A alone takes
A6 days
B18 days
C36 days
D24 days
Answer & Solution
Correct answer: B. 18 days
If B does r per day then A does 2r, so 3r = 1/12 and r = 1/36; A alone needs 18 days.
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