Question 1
A can do a job in 12 days and B in 15 days. Working together, they finish in: (CDS PYQ)
A6 days
B6⅔ days
C7 days
D7½ days
Question 2
A and B together complete a job in 10 days. A alone takes 15 days. B alone takes: (CDS PYQ)
A20 days
B25 days
C30 days
D35 days
Question 3
A can do a job in 20 days, B in 30 days. They work together for 6 days; then A leaves. B finishes the rest in: (CDS PYQ)
A10 days
B12 days
C15 days
D18 days
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