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← Back to MathHow to Use a Pie Wheel

Page 6 of 8

Jump to a Lesson

1. Pie Wheel Basics 2. Find the Top 3. Find a Bottom 4. Place the Numbers 5. Choose a Wheel 6. Three-Part Wheel 7. Find the Dose 8. Guided Practice

Lesson 6

Three Bottom Sections: Loading

Some wheels have three bottom sections, including the 8.34 factor. To find the top, multiply all three.

Loading / PoundsTap a section to cover the quantity you want to find.

What remainsLoading = Flow × Conc. × Factor

1
Identify unknown
Loading
2
Choose wheel
Loading / Pounds
3
Place values
Flow: 2.0 MGD · Concentration: 150 mg/L · Factor: 8.34
4
Cover unknown
Loading is on top, so multiply all three bottom sections.
5
Solve
2.0 MGD × 150 mg/L × 8.34 = 2,502 lb/day
6
Check units
The answer is in lb/day, the units of the top section.

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