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				| 1. | If the unsupported length of a stanchion is 4 metres and least radius of gyration of its cross-section is 5, the slenderness ratio of the stanchion, is | 
| A. | 60 | 
| B. | 70 | 
| C. | 80 | 
| D. | 90 | 
| Answer» D. 90 | |