(2) According to the meaning of the question and the function image, HA = 10V/25.

hA=8v/ 10

Solution, ha = 4

v = 10；

Answer: The height of A is 4 cm, and the water injection speed V is10cm3/s..

(3) Set the time required for filling the container as t s, the height of the container as h cm, the filling time as tC s and the height as hC cm.

The volume of ∵C is 14 of the container volume.

∴ TC = 1/4 (18+TC) gives TC = 6.

∴t= 18+tC= 18+6=24

∵5? HC = 10× 6, and the solution is HC = 12.

∴h= 12+hc= 12+ 12=24

Answer: It takes 24 s to fill this container, and the height of the container is 24 cm.