The water pressure of a sink has a steady flow of 2 cups per 10 minutes for the first 30 minutes. It still flows at 2 cups per 10 minutes for the next 30 minutes after. For the next hour, the water pressure maximizes to 4 cups per 10 minutes and stops. Shawn now has to dump half of the water away. How much water is left?
For the first 30 minutes, 3*2=<<3*2=6>>6 cups of water came out.
For the next 30 minutes, 3*2=<<3*2=6>>6 cups of water came out.
For the next hour, 6*4=<<6*4=24>>24 cups of water came out.
A total of 6+6+24=<<6+6+24=36>>36 cups of water came out.
Shawn had to dump water which left 36/2=<<36/2=18>>18 cups of water.
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