A man and a boy together can complete a job in 81 days. Two men and three boys together can complete the same job in 36 days. In how many days can four men together complete the same job?

A 21
B 27
C 30
D 36

Correct Answer: 27

Man = M , Boy = B1M + 1B = 1/8181M + 81B = 1 work2M + 3B = 1/3672M + 108B = 1 work81M + 81B = 72M + 81B9M = 27B 1M = 3B4M = 12B12B = 4/12 x 81 Days4M = 27 Days 
Bissoy MCQ
#সাধারণ গণিত #Bangladesh University of Professionals (BUP) #Faculty of Business Studies(FBS) 2015-2016

Related Questions

Two men and women are entrusted with a task. The second man needs three hours more to cope up with the job than the second man and the woman would need working together. The first man, working alone, would need as much time as second man and the woman working together. The first man working alone, would spend eight hours less than the double period of the time second man would spend working alone. How much time would the two men and the women need to complete the task if they all asked together?
A 1 hour
B 2 hours
C 3 hours
D 4 hours
E 5 hours
If 6 men and 8 boys can do a piece of work in 10 days and 26 men and 48 boys can do the same in 2 days , the time taken by 15 men and 20 boys to do the same type of work will be
A 4 days
B 5 days
C 6 days
D 7 days
If one man or two women or three boys can finish a job in 66 days, then find out the number of days in which that work can be done by one man two women , and three boys.
A 22
B 34
C 24
D 11
৫ঃ১৮ঃ,৭ঃ২ এবং ৩ঃ৬ এর মিশ্র অনুপাত কত?
A ৭২ঃ ১০৫
B ৭২ঃ ৩৫
C ৩৫ঃ ৭২
D ১০৫ঃ৭২
৫ঃ১৮, ৭ঃ২ এবং ৩ঃ৬-এর মিশ্র অনুপাত কত ?
A ৭২ঃ১০৫
B ৭২ঃ৩৫
C ৩৫ঃ৭২
D ১০৫ঃ২১৬
Two men and three women can repair a bridge in 10 days while three men and two women can to same work in 8 days. If two men and one woman are used to finish this work , in how many days they will complete it?
A 15.0 days
B 13.5 days
C 11.0 days
D 12.5 days
3 men or 5 women or 8 boys can finish a work in 38 days. How many days will be required to complete the same work by 6 men , 10 women and 6 boys together ?
A 5
B 6
C 7
D None of these
Three boys agree to divide a bag of marbles in the following manner. The first boy takes one more than half the marbles. The second takes a third of the number remaining. The third boy finds that he is left with twice as many marbles as the second boy. The original number of marbles is-
A 38
B 36
C 32
D Cannot be determined
12 men or 30 boys can complete a work in 72 days. How many days will 48 men and 24 boys will take to complete the same work?
A 20
B 18
C 15
D 25
If 3 men or 6 boys can do a piece of work in 10 days,working 7 hours a day; how many days will it take to complete a piece of work twice as large with 6 men and 2 boys working together for 8 hours a day ?
A 6
B 7.5
C 8.5
D 9

Next steps