26) A and B can do a work in 8 days, B and C can do the same work in 12
days. A, B and C together can finish it in 6 days. A and C together will
do it in :

A)4 days

B)6 days

C)8 days

D)12 days

Answer:
C

27) A can finish a work in 24 days, B in 9 days and C in 12 days. B and C
start the work but are forced to leave after 3 days. The remaining work
was done by A in:

A)5 days

B)6 days

C)10 days

D)10(1/2) days

Answer:
C

28) X can do a piece of work in 40 days. He works at it for 8 days and then Y
finished it in 16 days. How long will they together take to complete
the work?

A)13(1/3) days

B)15 days

C)20 days

D)26 days

Answer:
A

29) A and B can do a job together in 7 days. A is 1 times as efficient as B. The same job can be done by A alone in :

A)9(1/3) days

B)11 days

C)12(1/4) days

D)16(1/3) days

Answer:
B

30) A and B together can do a piece of work in 30 days. A having worked for
16 days, B finishes the remaining work alone in 44 days. In how many
days shall B finish the whole work alone?