A 12-year-old weighing 40 kg requires a medication dose of 0.5 mg/kg. What is the total dose?

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Multiple Choice

A 12-year-old weighing 40 kg requires a medication dose of 0.5 mg/kg. What is the total dose?

Explanation:
This question tests how to convert a per-kilogram dose to a total amount to administer. You multiply the dose per kilogram by the child’s weight in kilograms: 0.5 mg/kg × 40 kg = 20 mg. So the total dose is 20 mg. Think of it as the medication amount scales with weight, so once you know the per-kilogram dose and the patient’s weight, you simply multiply to get the total. If you see other numbers, they would reflect different per-kilogram doses or a different weight, not the same calculation.

This question tests how to convert a per-kilogram dose to a total amount to administer. You multiply the dose per kilogram by the child’s weight in kilograms: 0.5 mg/kg × 40 kg = 20 mg. So the total dose is 20 mg.

Think of it as the medication amount scales with weight, so once you know the per-kilogram dose and the patient’s weight, you simply multiply to get the total. If you see other numbers, they would reflect different per-kilogram doses or a different weight, not the same calculation.

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