A cylindrical water filter is filled with water at a rate of 11 cubic meters per hour, the level of water in the filter rises at a rate of 0.4 meters per hour. Which of the following best approximates the radius of the filter in meters? Choose the correct choice from the following answers
A) √10/2  B) √10  C) 4.183  D) 5  E) 10
Here's my re-worked solution:   volume = 11 = pi (r^2)(0.4)   22 = 22/7 (4/10)(r^2)   70/4 = r^2   r = sqrt(70/4)   Ans: 4.183
<result>C</result>
A cylindrical water filter is filled with water at a rate of 11 cubic meters per hour, the level of water in the filter rises at a rate of 0.4 meters per hour. Which of the following best approximates the radius of the filter in meters?