Time & Work

Q-TW-11Q.13

16 children can complete a task in 12 days working 4 hours a day. Find in what time 10 women will complete the same task with 60% more efficiency than that of a child working 6 hours a day?

1. (a) 9 days
2. (b) 6 days
3. (c) 12 days
4. (d) 8 days
5. (e) 10 days

Note: source key says (c) but its own worked solution ends 'y= 8 days' (option d); answer kept as printed

Q-TW-12Q.61

B is 20% less efficient than A, who completes a work in 72 days. C alone can complete the same work in 60 days. If all three started working alternatively starting with A and followed by B and C respectively, then find in how many days the work will be completed?

1. (a) 20 days
2. (b) 30 days
3. (c) 36 days
4. (d) 72 days
5. (e) 64 days