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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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ride (something) out or ride out (something)
to endure something unpleasant, to survive something safely
We were able to ride out the storm by staying in a small restaurant.
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