In a rectangular channel, area A = B*y. If B = 3 m and y = 1.2 m, what is A?

• A. 3.0 m^2
• B. 3.6 m^2
• C. 4.2 m^2
• D. 3.9 m^2

Answer: (B)

The cross-sectional area of a rectangular channel is found by multiplying its width by its depth. With width 3 m and depth 1.2 m, A = B × y = 3 m × 1.2 m = 3.6 m^2. So the area is 3.6 square meters.