Aptitude Practice Questions Time & Work
1.A can do a work in 12 days and B can do the same work in 36 days, in how many days can they complete the work, working together?
a)15 b) 9 c) 24 d)18 e) NOT
Ans: b) 9 days
2.P and Q can do a work in 15 days and 21 days respectively. P joins Q after some days and the total work is completed in 14 days. After how many days did P join Q?
a) 8 b) 7 c) 6 d) 9 e)12
Ans: d) 9th day
3.A, B and C can do a work in 10 days, 15 days and 20 days respectively. They work together and completed the work, earning ₹312. What is the share of C?
a)Rs.138 b) Rs.98 c) Rs.72 d) Rs.112 e) Rs.108
Ans: c) Rs.72
4.A is twice as good a workman as B and working together they finish a work in 14 days. In how many days can A alone finish the work?
a) 19 b) 17 c) 43 d) 21 e) 42
Ans: d) 21 days
5.M and N together finish a work in 30 days. In they work together for 20 days and then N left. The remaining work was done by M alone in the next 20 days. N alone can finish the work in
a)48 days b) 70 days c) 40 days d) 50 days e) 60 days
Ans: e) 60 days
6.Lalit and Bipin can do a work in 3 days and 7 days respectively. If they work on alternate days, then find the minimum number of days required to complete the work?
a)4 1/3 b) 4 1/7 c) 7 d) 3 e) None of These
Ans: b) 4 1/7 days
7. 33 binders can bind 2200 books in 24 days. Find the number of binders required to bind 1800 books in 18 days.
a)33 b) 30 c) 40 d) 36 e) None of these
Ans: d) 36 binders
8.12 men or 16 women can do a work in 18 days, in how many days can 9 men and 24 women do the work?
a)12 b) 8 c) 10 d) 18 e) 14
Ans: b) 8 days
9.Two men and four women can complete a piece of work in four days. One men and two women take the same time as five women to complete the work. Find the time by one women to complete the work
a)20 days b) 25 days c) 30 days d) 40 days e) 45 days
Ans: d) 40 days
10. X is four times efficient as Y in respect of doing a particular work. Working together they complete the work in 16 days . In how many days y working alone will be able to complete the half of the work?
a)80 days b) 40 days c) 20 days d) 60 days e) 25 days
Solution:-
X:Y= 4:1
If in 1 day X completes 4 units and Y completes 1 unit
in 1 day X+Y =4+1=5 units
in 16 days X+Y= 16*5 = 80 units of work
in 1 day Y Completes 1 unit
half work (50% ) of 80 units is 40 units
in 1 day Y completes =1 unit
to complete 40 units Y need 40 days
Ans: b) 40 days
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