Time and Work with Explanation
Q8. X is twice more efficient than Y. Y can mow a lawn in 12 days independently. If both X and Y are working together, in how days will they finish this work?
| A. 5 days | B. 6 days |
| C. 4 days | D. 9 days |
X's 1 day's work = 
Q9. 15 girls can complete a rangoli in 12 days, and 10 boys can complete the same work in 15 days. To complete the work earlier 10 boys and 15 girls are employed, in how many days will this work get completed?
| A. 6 days | B. 7 days |
| C. 6.5 days | D. 6 days |
Q10. Arjun and Varun can build furniture in 9 and 12 days respectively. If they work for a day alternately, Arjun beginning, in how many days the work will be completed?
A. 10 days |
B. 11 days |
C. 10 days |
D. 12 days |
Q11. P and Q can paint an office in 7 days. P is 1 times as efficient as Q. Find the days in which P alone can do the same job?
| A. 12 days | B. 13 days |
| C. 14 days | D. 11 days |
x = Q12. John, Mike, and Sam can do a plumbing work in 20, 30, and 60 days respectively. If Mike and Sam help John on every 3rd day, in how many days can John finish this work?
| A. 14 days | B. 13 days |
| C. 15 days | D. 16 days |
Q13. Ajay can pack gift items in 2 days, and Vijay can do the same work in 3 days. Both of them are involved in the work and get Rs. 150, find the share of Vijay?
| A. Rs. 60 | B. Rs. 70 |
| C. Rs. 75 | D. Rs. 80 |
Q14. X can complete a certain work in the same time in which Y and Z together can do it. If X and Y together can finish it in 10 days and Z alone in 15 days, then Y alone can do it in?
| A. 22 days | B. 25 days |
| C. 18 days | D. 20 days |
