Normal human blood sugar range is 65-105 mg/dL. Considering density of human blood is 1.06 kg/L, if a patient's sugar level reads 720 ppm, his/her blood sugar at that time is

Options

A. Normal
B. High
C. Low
D. Cannot say

Answer

To solve the problem, we need to convert the patient's sugar level from ppm (parts per million) to mg/dL and then compare it with the normal human blood sugar range.

### Step-by-Step Solution:

1. **Understanding ppm**:
- 1 ppm means 1 part of solute (sugar) per 1 million parts of solution (blood).
- In terms of mass, 720 ppm means there are 720 mg of sugar in 1 liter of blood.

2. **Convert the volume of blood to deciliters**:
- Since 1 liter = 10 deciliters (dL), we can find the amount of sugar in mg/dL.
- Therefore, 720 mg of sugar in 1 L of blood is equivalent to:
\[ \text{Sugar in mg/dL} = \frac{720 \text{ mg}}{10 \text{ dL}} = 72 \text{ mg/dL} \]

3. **Compare with normal blood sugar range**:
- The normal human blood sugar range is 65-105 mg/dL.
- The calculated blood sugar level of 72 mg/dL falls within this range.

4. **Conclusion**:
- Since 72 mg/dL is within the normal range, we can conclude that the patient's blood sugar level is normal.

### Final Answer:
The patient's blood sugar at that time is **normal**.

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