4
Q:

# A and B together finish a wor in 20 days.They worked together for 15 days and then B left. Afer another 10 days,A finished the remaining work. In how many days A alone  can finish the job?

 A) 30 B) 40 C) 50 D) 60

Explanation:

(A+B)'s 15 days work = $120×15=34$

Remaining work =  1/4

Now, 1/4 work is done by A in 10 days.

Whole work will be done by A in (10 x 4) = 40 days.

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:

0 83
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:

1 189
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 2594
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:

7 704
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

Explanation:

6 744
Q:

Prasid and Deep separately can do a certain work in 32 and 24 days respectively. They decided to do the work together and Niloy also joined them. If all of them together can complete the same work in 8 days, then how long does Niloy take to do the work alone?

 A) 925days B) 965days C) 945days D) 895days

Explanation:

4 538
Q:

Ten men or twelve women can finish the same working 10 days. If 5 men and 2 women undertake the work together, how many days will they take to complete the work?

 A) 15 B) 40 C) 20 D) 60

Explanation:

7 507
Q:

To complete a certain task, X is 40 % more efficient than Y, and Z is 40% less efficient than Y. Working together, they can complete the task in 21 days. Y and Z together worked for 35 days. The remaining work will be completed by X alone in:

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