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| Q. |
For the construction of the retaining structures, the type of concrete mix to be used, is |
| A. | 1 : 3 : 6 |
| B. | 1 : 2 : 4 |
| C. | 1 : 1½ : 3 |
| D. | 1 : 4 : 8 |
| Answer» C. 1 : 1½ : 3 | |
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