[Enquiry Officer, 2018]
11. In what ratio must a grocer mix two types of rice costing Rs. 7.50 per kg and Rs.10 per kg respectively, so as to get a mixture worth Rs. 8.25 per kg?
7 : 3
5 : 6
3 : 7
6 : 5
12. If A and B together can do a piece of work in 12 days and A alone can do it in 24 days, then in how many days B alone can do this work?
25 days
24 days
31 days
28 days
13. If A and B, working together can finish a piece of work in 5 days, B and C in 3 days, C and A in 6 days. How much time will they take to complete the work, if A, B and C work together?
\(7 {4\over 5} days\)
\(6 {4\over 5} days\)
\(7 {2\over 3} days\)
\(2 {6\over 7} days\)
14. If 5 men or 8 women can complete a work in 8 days. Then, 8 women and 15 men can take how many days to complete double work?
2 days
6 days
4 days
8 days
15. Suppose company A supply 15 men who work for 8 h per day for 5 days while company B supplies 6 men who work for 5 h per day for 10 days. If a total of Rs.1200 is paid as wages, then share of A's wages is:
Rs. 800
Rs. 810
Rs. 820
Rs. 840