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1. |
Calculate the length of the rapid sand filter for the following details.Flow: 1000 m3/h.Velocity: 5m/hBackwash time: 30 mins |
A. | 1.0 m |
B. | 1.9 m |
C. | 1.7 m |
D. | 1.2 m |
Answer» C. 1.7 m | |