The water level in a rectangular swimming pool measuring 20 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)	Choose the correct choice from the following answers.
A) 100	B) 250	C) 1875	D) 1200	E) 5625
6 inches = 1/2 feet (there are 12 inches in a foot.), so  20*25*1/2= 
<gadget id="calculator"> 20*25*1/2</gadget>
<output>250</output>
250 feet^3 of water must be removed, which equals to   250*7.5= 
<gadget id="calculator">  250*7.5</gadget>
<output>1_875</output>
1875 gallons.   Answer: 1875.
<result>C</result>
The water level in a rectangular swimming pool measuring 20 feet by 25 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)