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				| 1. | Calculate the backwash pump required for the activated carbon filter for the following details.Flow: 1000 m3/h.Rise Velocity: 15m/h | 
| A. | 1000 m3/hr | 
| B. | 1608 m3/hr | 
| C. | 1288 m3/hr | 
| D. | 1200 m3/hr | 
| Answer» C. 1288 m3/hr | |