Work-Time

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12 men and 16 women together can complete a work in 4 days. It takes 80 days for one man alone to complete the same work, then how many days would be required for one woman alone to complete the same work?
140 days
no
160 days
yes
145 days
no
158 days
no
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If 8 men can reap 80 hectares in 24 days, then how many hectares can 36 men reap in 30 days?
350
no
400
no
425
no
450
yes
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A tyre has 2 punctures. The first puncture alone would have made the tyre flat in 9 minutes and the second alone would have done it in 6 minutes. If air leaks out at a constant rate, how long does it take both the punctures together to make it flat?
1 ½ mins
no
3 1/2 mins
no
3 3/5 mins
yes
4 1/4 mins
no
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A cistern can be filled by two supply pipes in 20 mins and 30 mins respectively. But a waste pipe can empty it in an hour. Both the supply pipes were opened together to fill the empty cistern, but by mistake the waste pipe was also open. How much later was the waste pipe closed, if the cistern is filled in 14 mins?
6 mins
no
8 mins
no
10 mins
yes
12 mins
no
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A can do a piece of work in 12 days and B in 15 days. They work together for 5 days and then B left. The days taken by A to finish the remaining work are….
3
yes
5
no
10
no
12
no
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A man, a woman and a boy together finish a piece of work in 6 days. If a man and a woman can do the work in 10 and 24 days respectively, then days taken by a boy to finish the work are…
30
no
35
no
40
yes
45
no
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A can do a piece of work in 6 days, B in 10 days and C in 15 days. They jointly complete the work and earn Rs 300. The sum of their wages for 2 days is….
Rs 120
no
Rs 180
no
Rs 200
yes
Rs 160
no
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A and B together can complete a job in 8 days. Both B and C, working alone can finish the same job in 12 days. A and B commence work on the job, and works for 4 days, whereupon A leaves. B continues for 2 more days and then leaves too. C now starts working and finishes the job. How many days did C require? 
4
yes
5
no
8
no
3
no
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If 8 men or 12 boys can do a piece of work in 16 days, the number of days required to complete the work by 20 men and 6 boys are….
5 1/3
yes
6 1/3
no
8 1/3
no
7 1/3
no
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Pipe A alone can fill a tank in 8 hours. Pipe B alone can fill it in 6 hours. If both the pipes are opened and after 2 hours pipe A is closed, then the other pipe will fill the tank in….
6 hours
no
3 1/2 hours
no
4 hours
no
2 1/2 hours
yes
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