If a pool as Shown in the picture has 2 Water taps to fill the pool with water, if only the red water tap is opened the pool will be full of water in 3 hours, in other hand if only the black water tab is opened it takes 5 hours for the pool to be full.
The question is how much time (Hours : Minutes : Seconds) it will take to make the pool full if both water taps will be opened at the same time?
1 h : 52 m : 30 s
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