---
title: "Water flows from point \\( A \\) to points \\( D \\) and \\( E \\) as shown. Some of the flow parameters are known, as shown in the table. Determine the unknown parameters.            Section        Diameter        Flow Rate        Velocity                \\( \\text{AB} \\)        \\( 300 \\) \\( \\text{mm} \\)        ? \\( \\text{m}^3/\\text{s} \\)        ? \\( \\text{m/s} \\)                \\( \\text{BC} \\)        \\( 600 \\) \\( \\text{mm} \\)        ? \\( \\text{m}^3/\\text{s} \\)        \\( 1.2 \\) \\( \\text{m/s} \\)                \\( \\text{CD} \\)        ? \\( \\text{mm} \\)        \\( Q_3 = 2Q_4 \\) \\( \\text{m}^3/\\text{s} \\)        \\( 1.4 \\) \\( \\text{m/s} \\)                \\( \\text{CE} \\)        \\( 150 \\) \\( \\text{mm} \\)        \\( Q_4 = 0.5Q_3 \\) \\( \\text{m}^3/\\text{s} \\)        ? \\( \\text{m/s} \\)"
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url: "https://nerd-notes.com/ubq/86777/"
date_modified: "2025-04-17T01:42:16+00:00"
---

# Water flows from point \( A \) to points \( D \) and \( E \) as shown. Some of the flow parameters are known, as shown in the table. Determine the unknown parameters.            Section        Diameter        Flow Rate        Velocity                \( \text{AB} \)        \( 300 \) \( \text{mm} \)        ? \( \text{m}^3/\text{s} \)        ? \( \text{m/s} \)                \( \text{BC} \)        \( 600 \) \( \text{mm} \)        ? \( \text{m}^3/\text{s} \)        \( 1.2 \) \( \text{m/s} \)                \( \text{CD} \)        ? \( \text{mm} \)        \( Q_3 = 2Q_4 \) \( \text{m}^3/\text{s} \)        \( 1.4 \) \( \text{m/s} \)                \( \text{CE} \)        \( 150 \) \( \text{mm} \)        \( Q_4 = 0.5Q_3 \) \( \text{m}^3/\text{s} \)        ? \( \text{m/s} \)

Water flows from point \( A \) to points \( D \) and \( E \) as shown. Some of the flow parameters are known, as shown in the table. Determine the unknown parameters. Note the diagram above does not show the relative diameters of each section of the pipe.

| Section | Diameter | Flow Rate | Velocity |
| --- | --- | --- | --- |
| \( \text{AB} \) | \( 300 \) \( \text{mm} \) |  \(\textbf{?}\) |  \(\textbf{?}\) |
| \( \text{BC} \) | \( 600 \) \( \text{mm} \) |  \(\textbf{?}\) | \( 1.2 \) \( \text{m/s} \) |
| \( \text{CD} \) |  \(\textbf{?}\) | \( Q_{CD} = 2Q_{CE} \) \( \text{m}^3/\text{s} \) | \( 1.4 \) \( \text{m/s} \) |
| \( \text{CE} \) | \( 150 \) \( \text{mm} \) | \( Q_{CE} = 0.5Q_{CD} \) \( \text{m}^3/\text{s} \) |  \(\textbf{?}\) |

![Diagram](https://nerd-notes.com/wp-content/uploads/2025/04/fluidmassconservationdiagram-1-e1744220462393-300x174.png)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/86777/*