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
The right answer is option B.
Explanation :
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] = 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.
10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
A. 3
B. 5
C. 7
D. Cannot be determined
E. None of these
X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?
A. 6 days
B. 10 days
C. 15 days
D. 20 days
Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
A. 7 hours 30 minutes
B. 8 hours
C. 8 hours 15 minutes
D. 8 hours 25 minutes
Sakshi can do a piece of work in 20 days. Tanya is 25%u0025 more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is:
A. 15
B. 16
C. 18
D. 25