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    Writing an Equation from a Word Problem : 'Separately and Both Together' Problem

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    With only the small valve open, all of the liquid can be drained from a large vat in 4 hours. With only the large valve open, all of the liquid can be drained in 2 hours. How long would it take to drain the vat with both valves open?

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    https://brainmass.com/math/algebra/writing-an-equation-from-a-word-problem-separately-and-both-together-problem-37339

    Solution Preview

    Let x be the amount of liquid in the vat.

    The small valve drains all of the liquid in 4 hours; therefor the rate of flow from the small valve is x/4 per ...

    Solution Summary

    A 'Separately and Both Together' problem is solved, and the general formula of this problem type is discussed.

    $2.49

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