A and B can do a piece of work in 18 days ; B and C can do it in 24 days; A and C can do it in 36 days. In how many days can they do it all working together?
A.
16
B.
12
C.
19
D.
21
2.
A can do a piece of work in 80 days. He works at it for 10 days and then B alone
finished the remaining work in 42 days. The two togther could complete the work
in?
A.
21 days
B.
30 days
C.
27 days
D.
36 days
3.
A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
A.
25 hr
B.
16 hr
C.
32 hr
D.
12 hr
4.
A tyre has punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?
A.
25/4
B.
32/7
C.
24/7
D.
5
5.
A and B can do a piece of work in 45 days and 40 days respectively. They
began to go the work together but A leaves after some days and than B completed
the reaminnig work in 23 days. The number o days after which A left the work
was?
A.
29
B.
24
C.
23
D.
9
6.
10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
A.
12
B.
7
C.
16
D.
9
7.
A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has been working at it for 5 days and B for 7 days, C finishes in 13 days. In how many days C alone will do the work ?
A.
12
B.
24
C.
18
D.
30
8.
A and B can together finish a work in 30 days. They workd at it for 20 days and
then B left. The remaining work was done by A alone in 20 more days A alone
can finish the work in?
A.
60 days
B.
45 days
C.
55 days
D.
40 days
9.
A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work?
A.
8 days
B.
10 days
C.
4 days
D.
6 days
10.
45 men can complete a work in 16 days. Six after they started working, 30 more men joined them. How many days will they now take to complete the remaining work ?
Quantitative Aptitude Quiz: IBPS RRB Group-A Officers!
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Sample Question
The age of a man is three times the sum of the ages of his two sons. Five years hence, his age will be double of the sum of the ages of his sons. The father's present age is?