3 years ago in Time and Work

# A and B can do a job together in 7 days. A is 1 3/4 times as efficient as B. The same job can be done by A alone in :

[A] 9 <sup>1</sup>/<sub>3</sub> days
[B] 11 days
[C] 12 <sup>1</sup>/<sub>4</sub> days
[D] 16 <sup>1</sup>/<sub>3</sub> days

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## Related Questions

### 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

### Machine A produces bolts at a uniform rate of 120 every 40 second, and Machine B produces bolts at a uniform rate of 100 every 20 seconds. If the two machines run simultaneously, how many seconds will it take for them to produce a total of 200 bolts?

• [A] 20 seconds
• [B] 24 seconds
• [C] 26 seconds
• [D] 25 seconds
• [E] 30 seconds

• [A] 80 days
• [B] 72 days
• [C] 100 days
• [D] 120 days

• [A] 9
• [B] 10
• [C] 16
• [D] 12
• [E] 15

• [A] 7.5 hr
• [B] 8 hr
• [C] 8.5 hr
• [D] 10 hr