The specific gravity of a substance is the ratio of its density to the density of a reference substance, usually water. In this question, the specific gravity of silver is given as 11 and the specific gravity of iron is given as 8.

To find the approximate relative density of silver with respect to iron, we need to divide the specific gravity of silver by the specific gravity of iron.

Option 1: 1.4 - To check if this is the correct answer, we divide 11 (specific gravity of silver) by 8 (specific gravity of iron). 11/8 is approximately 1.375, which is close to 1.4. Therefore, option 1 is the correct answer.

Option 2: 0.7 - To check if this is the correct answer, we divide 11 (specific gravity of silver) by 8 (specific gravity of iron). 11/8 is approximately 1.375, which is not close to 0.7. Therefore, option 2 is incorrect.

Option 3: 3.0 - To check if this is the correct answer, we divide 11 (specific gravity of silver) by 8 (specific gravity of iron). 11/8 is approximately