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				| 1. | A compound pipe line is made up of pipe 45 cm dia. for 900 m, 37.5 cm for 450 m and 30 cm for 300 m is required to replace by a pipe of uniform diameter. Find diameter of equivalent pipe. | 
| A. | 0.37 cm | 
| B. | 3.7 cm | 
| C. | 3.7 m | 
| D. | 0.37 m | 
| Answer» E. | |