Question
The figure shows 2 completely filled containers being emptied of the water from 2 different taps. The difference in height between Container T and Container U is 15 cm. The taps at Container T and Container U were turned on at 15 00 and 15 30 respectively, until both were completely empty. At 19 00, the water level in both tanks was the same. At 21 30, Container U was completely empty and Container T was only completely empty at 21 00. If the rate of the flow of water from each tap was constant throughout, what was the height of Container U?
4 m

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The figure shows 2 completely filled containers being emptied of the water from 2 different taps. The difference in height between Container T and Container U is 15 cm. The taps at Container T and Container U were turned on at 15 00 and 15 30 respectively, until both were completely empty. At 19 00, the water level in both tanks was the same. At 21 30, Container U was completely empty and Container T was only completely empty at 21 00. If the rate of the flow of water from each tap was constant throughout, what was the height of Container U?