142
Q:

# 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

Explanation:

2(A+B+C)'s 1 day work = 1/30 + 1/24 + 1/20 = 1/8

=>(A+B+C)'s  1 day's work= 1/16

work done by A,B and C in 10 days=10/16 = 5/8

Remaining work= 3/8

A's 1 day's work= $116-124=148$

Now, 1/48 work is done by A in 1 day.

So, 3/8 work  wil be done by A in =48 x (3/8) = 18 days

Q:

A, B and C can individually complete a piece of work in 24 days, 15 days and 12 days, respectively. B and C started the work and worked for 3 days and left. The number of days required by A alone to complete the remaining work, is:

 A) 11 B) 15.5 C) 18 D) 13.2

Explanation:

0 22
Q:

A is 40% more efficient than B and C is 20% less efficient than B. Working together, they can complete a task in 20 hours. In how many hours will A alone complete 35% of that task?

 A) 14 B) 15 C) 13 D) 16

Explanation:

0 47
Q:

The efficiencies of A, B and C are in the ratio of 2 : 3: 5. Working together, they can complete a task in 6 days. In how many days will A alone complete 20% of that task?

 A) 4 B) 8 C) 5 D) 6

Explanation:

1 114
Q:

The efficiencies of A, B and C are in the ratio 2 : 5 : 3. Working together, they can compete a task in 9 days. In how many days will C alone complete 40% of that task?

 A) 15 B) 14 C) 12 D) 16

Explanation:

2 207
Q:

A can finish a work in 20 days and B can finish the same work in 25 days. They begin together, but B left the work after 5 days. How many more days will A take to finish the remaining work?

 A) 11 B) 8 C) 16 D) 21

Explanation:

1 276
Q:

A earns ₹180 per hour and works for 7 hours per day. B earns ₹160 per hour and works for 5 hours per day. What is the ratio of per day wages of A and B?

 A) 40 : 61 B) 63 : 40 C) 20 : 30 D) 33 : 20

Explanation:

2 3260
Q:

If 100 cat kill 100 .mice in 100 days, then 4 cats would kill 4 mice in how many days?

 A) 4 days B) 3 days C) 40 days D) 100 days

Explanation:

7 747
Q:

Four men and 6 women can complete a certain piece of work in 5 days whereas three men and 4 women can complete it in 7 days.How many men should assist 25 women to complete 2.5 times the same work in 5 days?

 A) 8 B) 10 C) 4 D) 5