Sand is poured into a box so that the box is being filled at the rate of 3 cubic feet per hour. If the empty rectangular box is 5 feet long, 4 feet wide, and 3 feet deep, approximately how many hours does it take to fill the box?
Answers
A) 14  B) 16  C) 18  D) 20  E) 22
The volume the box is: length*width*depth = 5*4*3= 
<gadget id="calculator">5*4*3</gadget>
<output>60</output>
60 cubic feet.   60 cubic feet / 3 cubic feet per hour= 20 hours.   It will take 20 hours to fill the box.   The answer is 20.
<result>D</result>
Sand is poured into a box so that the box is being filled at the rate of 3 cubic feet per hour. If the empty rectangular box is 5 feet long, 4 feet wide, and 3 feet deep, approximately how many hours does it take to fill the box?