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A tank contains 1.2 MG. The flow through it is 0.6 MGD. What is the detention time in days?

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0.5 days2 days0.72 days0.03 days

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Curated values teach an idealized volume-and-flow relationship. They are not operating targets, design criteria, usable-volume assumptions, or claims about actual hydraulic residence time in a facility.

This Draft family uses selected mathematical facts only. It does not reproduce an official formula sheet or claim Washington exam weighting.

Printed page 2 of 10, Detention Time
Printed page 8 of 10, Abbreviations: gal, gpd, gpm, hr, MG, MGD, and min
Chapter 5, Table 6: 1 min = 60 s; 1 h = 60 min = 3,600 s; 1 d = 24 h = 86,400 s