Question

1. The dose of a drug is 5mg/kgbody weight. How much of
drug is required for a boy of 12 years who weighs 21 kg.
(a) 0.5 mg
(6) 1.0 mg
(c) 1.5 mg
(d) 2.0 mg​

Answer 1

Answer:

1.0mg

Step-by-step explanation:

Answer 2

The dose of drug is required for a boy of 12 years who weighs 21 kg is 105 mg.

The dose of a drug is 5mg per kg of body's weight.

We have to find the drug required for a boy of 12 years who weighs 21 kg.

Dose of the drug depends on the weight of the body. It is prescribed as 5 mg per kg of body's weight.

∵ Weight of a boy of 12 years = 21 kg

∴ The dose of drug should be required = 5 mg / kg × 21 kg = 105 mg

Therefore the dose of drug is required for a boy of 12 years who weighs 21 kg is 105 mg.