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=
<gadget id="calculator">3*2</gadget>
<output>6</output>
6 cups of water came out.
For the next 30 minutes, 3*2=
<gadget id="calculator">3*2</gadget>
<output>6</output>
6 cups of water came out.
For the next hour, 6*4=
<gadget id="calculator">6*4</gadget>
<output>24</output>
24 cups of water came out.
A total of 6+6+24=
<gadget id="calculator">6+6+24</gadget>
<output>36</output>
36 cups of water came out.
Shawn had to dump water which left 36/2=
<gadget id="calculator">36/2</gadget>
<output>18</output>
18 cups of water.

<result>18</result>