Time And Work

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61 When A alone does a piece of work, he takes 25 days more than the time taken by (A + B) to complete that particular work, while B alone takes 49 days more than the time taken by (A + B) to finish the same work. A and B together will take what time to finish this work?

A
35 days
B
25 days
C
15 days
D
45 days

62 Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. What is the ratio between the capacity of a man and a woman?

A
3 : 4
B
4 : 3
C
5 : 3
D
Data inadequate

63 A alone can complete a work in 16 days and B alone in 12 days. Starting with A, they work on alternate days. The total work will be completed in

A
12 days
B
13 days
C
13 5/7 days
D
13 3/2 days

64 4 goats or 6 sheeps can graze a field in 50 days. 2 goats and 9 sheeps can graze the field in

A
100 days
B
75 days
C
50 days
D
25 days

65 A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work in 23 days. The number of days after which A left the work was:

A
6
B
8
C
9
D
12

66 20 men complete one-third of a work in 20 days. How many more men should be employed to finish the rest of work in 25 more days?

A
15
B
12
C
18
D
25

67 A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work?

A
18 days
B
24 days
C
30 days
D
36 days

68 A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in

A
4 days
B
6 days
C
8 days
D
12 days

69 A and B can do a job together in 12 days. A is 2 times as efficient as B. In how many days can B alone complete the work?

A
36
B
12
C
18
D
9

70 10 men and 8 women together can complete a work in 5 days. Work done by one woman in a day is equal to half the work done by a man in 1 day. How many days will it take for 4 men and 6 women to complete that work?

A
12 days
B
10 days 2 3
C
8 days
D
4 days