Time & work

TYPE -1
A+B  3 days
B  12 days

A ?
A+B+C  4 days
A  12 days
B  18 days

C ?
Q 1 : A & B working together can do a piece of
work in 12 days. B & C working together can
do a piece of work in 15 days. C & A working
together can do a piece of work in 20 days. In
how many days A can do the same work ?
A. 20
B. 30
C. 40
D. 60

Answer = B
Q 2 : A & B working together can do a piece of
work in 8 days. B & C working together can do
a piece of work in 12 days. A, B and C all
working together can do a piece of work in 6
days. In how many days A & C working
together can do?
A. 3
B. 4
C. 6
D. 8

Answer = D
Q 3 : A can do a piece of work in 12 days. B can
do same piece of work in 15 days. After A had
worked for 3 days B also join A to finish the
remaining work. In how many days work will
be finished?
A. 3
B. 5
C. 6
D. 8

Answer = D
Q 4 : A can do a piece of work in 9 days. B can do
same piece of work in 10 days. C can do same
piece of work in 15 days. B and C start working
and left after 2 days. In how many days
remaining work will be finished by A?
A. 4
B. 6
C. 8
D. 10

Answer = B
Q 5 : A can do a piece of work in 8 hours. B can
do same piece of work in 12 hours. A starts
working at 9AM and they worked on
alternative hours. At which time work will be
finished?
A. 3:30 pm
B. 6:30 pm
C. 3:30 am
D. 6:30 am

Answer = B
Q 6 : A, B and C can do a piece of work in 11, 20
and 55 days respectively. In how many days
work will be finished if A is assisted by B and
C on alternative day?
A. 4
B. 6
C. 8
D. 16

Answer = C
Q 7 : A, B and C can do a piece of work in 20, 30
and 60 days respectively. In how many days
work will be finished by A, if he is assisted by
B and C on every third day?
A. 5
B. 10
C. 15
D. 20

Answer = C
Q 8 : A can do a work in same time in which B &
C can do it working together. A & B working
together can do it in 10 days. C can do same in
50 days. In how many days B can do the work
individually?
A. 2
B. 5
C. 15
D. 25

Answer = D
Q 9 : A and B can do a piece of work in 20 and 30
days respectively. Both starts working on same
time but B left the work 5 days before the
completion of work. In how many days work
will complete ?
A. 12
B. 14
C. 16
D. 20

Answer = B
Q 10 : A, B and C can do a piece of work in 24, 32
and 64 days respectively. They starts working,
A left the work after 6 days while B left the
work before 6 days from the completion of
work. In how many days work will be
finished?
A. 20
B. 18
C. 15
D. None of these
Answer = A
Q 11 : A & B working together can do a job in 30
days. They worked only for 20 days and the
rest job is done by A in next 20 days. In how
many days A can do the complete job
individually?
A. 30
B. 40
C. 60
D. 120

Answer = C
Q 12 : A & B working together can do a piece of
work in 12 days. B & C working together can
do same work in 16 days. A worked for 5 days,
B for 7 days and rest work is finished by C in
13 days. In how many days working alone C
can do the same work ?
A. 48
B. 24
C. 18
D. 12

Answer = B
Time & work

TYPE -2
Q 13 : A is twice as good as B and together they
can finish the work in 18 days. In how many
days A will finish the same work?
A. 9
B. 24
C. 54
D. 27

Answer = D
Q 14 : Monica can do a job in 20 days. Tanya is
25% more efficient than Monica. In how many
days Tanya will finish the same work?
A. 14
B. 15
C. 16
D. 18

Answer = C
Q 15 : A is 50% more efficient than B. C does half
of the work done by A & B together. If C alone
do the work in 40 days. In how many days All
will finish the same work together?
A. 10/3
B. 20/3
C. 30
D. 40/3

Answer = D
Q 16 : A is thrice as good as B and he is able to
finish the work 60 days less than B. In how
many days they will finish the same work
together?
A. 90/4
B. 45/4
C. 30/4
D. 22/4

Answer = A
Time & work

TYPE -3
Q 17 : 40 men can do a job in 40 days. They starts
together but after every 10 days 5 men left the
job. In how many days work will be finished ?
A. 56 days
B. 57 days
C. 56 and 1/3 days
D. 56 and 2/3 days

Answer = D
Q 18 : 12 men or 18 women can do a job in 14
days. In how many days work will be finished
by 8 men and 16 women ?
A. 8 days
B. 9 days
C. 12 days
D. 4 and half days

Answer = B
Q 19 : A builder decided to form a house in 45
days. He employed 150 workers in the
beginning and 120 more workers after 30 days
and finished the contract in time. If he had not
employed the extra workers, how many days
behind the schedule work has been finished?
A. 57 days
B. 23 days
C. 18 days
D. 12 days

Answer = D
Q 20 : 12 men or 15 women can do a job in 4 days.
6 men starts working and left after 2 days. How
many women were put on the job to complete
the remaining work in next 3 days ?
A. 12
B. 15
C. 18
D. 21

Answer = B
Q 21 : A contractor undertake a contract of 12 km
long tunnel in 350 days with 45 workers. After
200 days he found that only 4.5 km tunnel has
been finished. Find number of extra workers
he must employee to finish the tunnel in time.
A. 100
B. 55
C. 45
D. 145

Answer = B
Work & Wages
Q 1 : A can do a job in 10 days and B in 15 days.
They are working together and charged ₹ 5000.
what will be the share of A?
A. 1000 ₹
B. 2000 ₹
C. 3000 ₹
D. 4000 ₹

Answer = C
Q 2 : A can do a job in 10 days and B in 15 days.
They charged ₹ 5000 together for same job and
A worked only for 4 days. Rest work is done by
B. what will be the share of B?
A. 1000 ₹
B. 2000 ₹
C. 3000 ₹
D. 4000 ₹

Answer = C
Q 3 : A can do a job in 10 days and B in 15 days.
They are working on a project of ₹ 1500. If A
and B worked for 5 days and rest work is
finished by C in 2 days. What will be the daily
wages of C ?
A. 100 ₹
B. 125 ₹
C. 225 ₹
D. 250 ₹

Answer = B