Water Is Flowing Through a Rectangular Channel That Is 12

Multiple Choice

Water is flowing through a rectangular channel that is 12 m wide with a speed of 0.75 m/s. The water then flows into four identical rectangular channels that have a width of 3.0 m. The depth of the water does not change as it flows into the four channels. What is the speed of the water in one of the smaller channels?

A) 0.56 m/s
B) 2.3 m/s
C) 0.25 m/s
D) 0.75 m/s
E) 3.0 m/s