Question: During a field exploration program, rock was cored for a length of 4.5 m and the length of the rock core recovered was 2.5 m.

During a field exploration program, rock was cored for a length of 4.5 m and the length of the rock core recovered was 2.5 m. All the rock pieces recovered having a length of 101.6 mm or more had a combined length of 2.1 m. Determine the recovery ratio and the rock quality designation. Use Table 18.9 to comment on the quality of the rock.

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