Aptitude > Time and Work > General Questions

[abdulsaboor]

Aptitude > Time and Work > General Questions

[abdulsaboor]

2.
A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:

A.
46/5 days

B.
47/5 days

C.
48/5 days

D. 10



3.
A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

A. 12 days
B. 15 days
C. 16 days
D. 18 days



A's 2 day's work =[1/20]*2=1/10

(A + B + C)'s 1 day's work =1/20 + 1/30 +1/60 =6/60=1/10
Work done in 3 days =1/10 +1/10=1/5
Now, 1/5 work is done in 3 days.

Whole work will be done in (3 x 5) = 15 days.

[abdulsaboor]

4.
A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:

A. 20 days
B. 45/2days
C. 25 days
D. 30 days


5.
A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?

A. Rs. 375
B. Rs. 400
C. Rs. 600
D. Rs. 800