ThE answer is C, congrats
Answer:
Volume required in the tank (200 × 150 × 2)m3. therefore, required time= (6000/625)= 96 min.
Let x = negative real number ⇒x<0
from the statement above, we can generate an equation:
(x + 5)² = 48

=
⇒ eliminate the square by getting the square root on both sides

⇒ the perfect square of a real number has one positive real number and a negative real number
transposing 5 to other side, we will arrive at two (2) values for x:

= -5 - 4√3 =
-11.928
= -5 + 4√3 = 1.928
Since we are only looking at the negative real number, our answer will be -11.928, also equal to -5 - 4√3.
The volume of a cone is 1/3Bh. The base is pi times the radius squared, so the base is 16 pi. 32 pi = 1/3 • 16 pi • h. 32 pi = 16/3 pi • h. Divide 32 pi by 16/3 pi to find the height, which equals 6.