`1` kg `= 1000` grams `= 1000000` mg and `1` m `= 100` cm `= 1000` mm.
Convert 3 kg 15 grams into milligrams.

Options

A. 3015000 mg
B. 301500 mg
C. 3015 mg
D. None of these

Answer

To convert 3 kg 15 grams into milligrams, we can follow these steps:

### Step 1: Convert kilograms to milligrams
1 kg is equal to 1,000 grams, and 1 gram is equal to 1,000 milligrams. Therefore, to convert kilograms to milligrams, we use the following conversion:
- 1 kg = 1,000 grams = 1,000,000 mg (since 1,000 grams × 1,000 mg/gram = 1,000,000 mg).

Now, for 3 kg:
- 3 kg = 3 × 1,000,000 mg = 3,000,000 mg.

### Step 2: Convert grams to milligrams
Next, we need to convert the 15 grams into milligrams:
- 1 gram = 1,000 mg.

So for 15 grams:
- 15 grams = 15 × 1,000 mg = 15,000 mg.

### Step 3: Add the two results together
Now, we add the milligrams from the kilograms and the milligrams from the grams:
- Total in milligrams = 3,000,000 mg + 15,000 mg = 3,015,000 mg.

### Final Answer
Thus, 3 kg 15 grams is equal to **3,015,000 mg**.

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