Time & Work SSC CGL 2021 questions
time and work carries minimum 1 question for prelims and 5 questions for mains let have a look on the following questions
do comment your answers
1)A can finish a piece of the work in 16 days and B can finish it in 12 days. They worked together for 4 days and then A left B finished the remaining work. For how many total number of days did B work to finish the work completely?
a)6
b)9
c)4
d)8
ans: b
2) X, Y and Z can do a piece of work in 46 days, 92 days and 23 days, respectively. X started the work. Y joined him after 2 days. If Z joined them after 8 days from the beginning, then for how many days did X work?
a)16
b) 21
c) 18
d) 13
ans : c
3)A can finish a piece of work in 48 days and B can finish it in 60 days. They work together for 12 days and then A goes away. In how much time (in days and hours) will B finish 25% of the remaining work?
a) 6 days 4 hours
b) 8 days 8 hours
c) 6 days 6 hours
d) 8 days 6 hours
ans : d
4) A, B and C can do a work in 8 10 and 12 days, respectively. After completing the work together, they received 5,550. What is the share of B (in rs) in the amount received?
a)1500
b)1850
c)1800
d)1696
ans : c
5)A can complete 25% of a work in 15 days. He works for 15 days and then B alone finishes the remaining work in 30 days. In how many days will A and B working together finish 50% of the same work?
a)24
b) 20
c)12
d) 25
6) Five men and 2 boys can do in 30 days as much work as 7 men and 10 boys can do in 15 days. How many boys should join 40 men to do the same work in 4 days?
a)10
b)15
c)12
d)14
ans : a
7) If 4 men and 6 boys can do a work in 8 days and 6 men and 4 boys can do the same work in 7 days, then how many days will 5 men and 4 boys take to do the same work?
a)6
b)8
c)5
d)7
ans : b
8) A tyre has 3 punctures. The first puncture alone would have made the tyre flat in 9 minutes, the second alone would have done it in 18 minutes, the third alone would have done it in 6 minutes. If the air leaks out at a constant rate, then how long (in minutes) does it take for all the punctures together to make it flat?
a)2
b)6
c)4
d)3
ans :d
9) Person A can do one-fifth of the work in 3 days, while B’s efficiency is half of that of A. In how many days A and B working together can do half of the work?
a)4
b)7
c)6
d)5
ans : d
11) A man, a woman and a boy can complete a work in 3, 4 and 12 days, respectively. How many boys must assist one man and one woman to complete the same work in one day?
a)5
b)7
c)4
d)9
ans : a
12) A can complete work in 25 days and B can complete the same work in 20 days. They started the work together but B left after 4 days and A continued to work. In how many days will the entire work be completed?
a)25
b)20
c)28
d)22
ans : b
13) A can do a certain work in 15 days, while B can do the same work in 21 days. If they work together, then in how many days will the same work be completed?
a) 7 3/4
b) 9 3/4
c) 6 3/4
d) 8 ¾
ans : d
14) 14 men can complete a work in 15 days. If 21 men are employed, then in how many days will they complete the same work?
a)10
b)14
c)12
d)15
ans : a
15) X. Y and Z can complete a piece of work in 46 days, 92 days and 23 days, respectively. X started the work. Y joined him after 7 days. If Z joined them after 8 days from the beginning, then for how many days did Y work?
a)12 5/7
b) 11 5/7
c) 10 5/7
d) 9 5 /7
ans : b
15) 20 men can finish a work in 30 days. They started working, but 4 men left the work after 10 days. In how many days would the work be completed?
a)30
b)25
c)35
d)28
ans: c
16)A college hostel mess has provisions for 25 days for 350 boys. At the end of 10 days, when some boys were shifted to another hostel, it was found that now the provisions will last for 21 more days. How many boys were shifted to another hostel?
a)92
b)110
c)98
d)100
ans : d
17) P and Q completed a work together and were paid 1,080 and 1,440, respectively. If P can do the entire work in 20 days, how many days did they take to complete the work together?
a) 6. 4/7
b) 6 3/7
c) 8 3 /7
d) 8 4 /7
ans : d
18) A and B can do a work in 12 days and 18 days, respectively. They worked together for 4 days after which B was replaced by C and the remaining work was completed by A and C in the next 4 days. In how many days will C alone complete 50% of the same work?
a) 24
b) 18
c) 21
d) 36
ans : b
19) A tyre has two punctures. The first puncture alone would have made the tyre flat in 45 minutes, and the second puncture alone would have done it in 90 minutes. If air leaks out at a constant rate, then how long (in minutes) does it take for both the punctures together to make the tyre flat?
a)30
b)15
c)40
d)45
ans :a
20)If 35 men can finish a work in 6 days, then in how many days can 7 men do half of the same work?
a) 30
b) 15
c) 60
d) 17
ans : b
21)A and B working alone can complete a work in 8 days and 12 days, respectively. They started working together, but A left 2 days before completion of the work. In how many days was the work completed?
a)5
b) 8
c)10
d) 6
ans :
TIME & DISTANCE 2O21 QUESTIONS ASKED IN ALL SHIFTS
AVERAGE 2O21 QUESTIONS ASKED IN ALL SHIFTS