b) Cross section area of the pipe = pi * r^2 = pi * (0.49 / 2)^2 = 0.754 m^2 Speed = 1.0 m/s, so the flow rate 1.0 * 0.754 = 0.754 m^3/s d) If the diameter is doubled, the cross sectional area is increased by 2^2 Flow rate = 0.754 * 4 = 3.016 m^3/s

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