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Test # 115
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1. Three taps are connected to a water tank. First and second taps till it up in 'x' minutes and 'y' minutes respectively, when they arc opened separately. The third tap empties the full tank in 'z' minutes. If all are opened simultaneously, what is the condition required on 'x', 'y' and Y to ensure that the tank will actually fill up?

Quantitative Aptitude Test 115

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out of step with (someone or something)
out of harmony or not in agreement with someone or something
The boy is out of step with the rest of the group and he needs to think about what he should be doing.
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