Question

A person weighs 150.0 lb, and the correct dosage of a drug is given as 1.50 mg per kilogram of body weight. How many milligrams of the drug should be given? (2.20 lb = 1 kg)

Answer 1

Answer: The amount of drug that must be given is 102.3 grams

Explanation:

We are given:

Weight of the person = 150.0 lb

Converting this weight into kilograms, we use the conversion factor:

1 kg = 2.20 lb

So, $150.0lb\times (\frac{1kg}{2.20lb})=68.2kg$

Applying unitary method:

For 1 kg of body weight, the correct dosage of the drug is 1.50 mg

So, for 68.2 kg of body weight, the correct dosage of the drug will be $\frac{1.50mg}{1kg}\times 68.2kg=102.3mg$

Hence, the amount of drug that must be given is 102.3 grams