1) A and B together can finish a work in 12 days, whereas B and C together can finish the same work in 20 days and A and C together can finish the work in 15 days. Then the ratio of days of A working alone to complete the work to that of B is ?
A. 2:3
B. 1:2
C. 1:3
D. 2:1
2) A professional institute's total expenditure on students for a particular course is partly fixed and partly varies linearly with number of students .The average expense per student is Rs 615 when there are 24 students and Rs 465 when there are 40 students. What is the average expense when there are 60 students ?
A. 350
B. 390
C. 410
D. 370
3) 30 women can do a work in 10 days and 45 children can do the same work in 12 days, then what is the ratio of amount of work done by 15 women in 1 day to work of 30 children in 1 day.
A. 2:5
B. 3:5
C. 1:3
D. 2:3
4) 6 men and 8 women can complete a work in 10 days. 26 men and 48 women can finish the same work in 2 days. 15 men and 20 women can do the same work in ?
A. 8 days
B. 4 days
C. 6 days
D. 10 days
5) 30 men working 4 hrs a day can do a piece of work in 10 days. Find the no. of days in which 45 men working 8 hrs a day can do twice the work. Its given that 2 men of the first group do as much work in 2 hrs as 4 men of the second group do in 1 hr .
A. 6(1/3) days
B. 6(2/3) days
C. 5(3/6) days
D. 5(1/3) days
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