If the cold-water tap and hot-water tap running together can fill a bathtub in \(30\) minutes, how long would it take

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If the cold-water tap and hot-water tap running together can fill a bathtub in \(30\) minutes, how long would it take the hot water tap alone to fill the tub?

1) The cold water tap alone could fill the tub in \(45\) minutes

2) The hot water tap can fill a \(10\)-gallon tank in \(10\) minutes

The OA is A
Source: — Data Sufficiency |