2 years ago in Time and Work

# X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?

[A] 6 days
[B] 10 days
[C] 15 days
[D] 20 days

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## Related Questions

• [A] 12
• [B] 3
• [C] 15
• [D] 10

### A pipe can fill a tank in 0.9 hours and another pipe can empty in 0.7 hours. If tank is completely filled and both pipes are opened simultaneously then 450 liters of water is removed from the tank is 2.5 hours. What is the capacity of the tank?

• [A] 200 liters
• [B] 350 liters
• [C] 456 liters
• [D] 567 liters
• [E] None of these

### 5 men or 8 women do equal amount of work in a day. A job requires 3 men and 5 women to finish the job in 10 days how many woman are required to finish the job in 14 days?

• [A] 10
• [B] 7
• [C] 6
• [D] 12
• [E] none of these

### Two pipes A and B can fill a tank in 24 min. and 32 min. respectively. If both the pipes are opened simultaneously, after how much time B should be closed so that the tank is full in 18 minutes?

• [A] 12 minutes
• [B] 10 minutes
• [C] 15 minutes
• [D] 6 minutes
• [E] 8 minutes

• [A] 4 days
• [B] 6 days
• [C] 8 days
• [D] 18 days