Q : A work is done by 30 workers not all of them have the same capacity to work. Every day exactly 2 workers, do the work with no pair of workers working together twice. Even after all possible pairs have worked once, all the workers together works for six more days to finish the work. Find the number of days in which all the workers together will finish the work?
(A) 22 days
(B) 20 days
(C) 24 days
(D) 35 days
Correct Answer : D
Q : A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C can do it in 90 days. In how many days all three together can do the work ?
(A) 80 days
(B) 100 days
(C) 60 days
(D) 150 days
Correct Answer : C
Q : A and B can do a piece of work in 12 days. B and C in 15 days and C and A in 20 days. If A, B and C work together, they will completer the work in :
(A) 5 days
(B) 10 days
(C) 15 days
(D) 20 days
Correct Answer : B
Q : A school has 8 periods of 45 min each, everyday. How long will each period be if the school has to have 9 periods everyday, assuming the working hours to be the same?
(A) 35 min
(B) 30 min
(C) 40 min
(D) 45 min
Correct Answer : C
Q : 10 men working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the same work in 12 days?
(A) 6 hrs /day
(B) 10 hrs / day
(C) 12 hrs / day
(D) 15 hrs / day
Correct Answer : A
Q : 12 persons can do a piece of work in 4 days. How many persons are required to complete 8 times the work in half the time?
(A) 192
(B) 190
(C) 180
(D) 144
Correct Answer : A
Q : If in a hostel there is sufficient food for 30 days for 40 students, then this food will last for how many days for 60 students?
(A) 20 days
(B) 24 days
(C) 18 days
(D) 15 days
Correct Answer : A
Q : A certain number of men can do a work in 60 days. If there were eight more men, it could be completed in 10 days less. How many men were there in the beginning?
(A) 70
(B) 55
(C) 45
(D) 40
Correct Answer : D
Q : A can finish a piece of work in 18 days and B can do the same work in half the time taken by A. Then working together. What part of the same work they an finish in a day?
(A)
(B)
(C)
(D)
Correct Answer : A
Q : A work could be completed in 100 days by some workers. How- ever, due to the absence of 10 workers, it was completed in 110 days. The original number of workers was:
(A) 100
(B) 110
(C) 180
(D) 144
Correct Answer : B
