A syrup has a concentration of 20 mg in every 5 ml. What volume must be given to deliver a 40 mg dose?

Question

TheoryPractice · Accepted Answer

10 ml. Since 5 ml carries 20 mg, doubling both quantities gives 10 ml for 40 mg.

Why the other options are incorrect:
• 5 ml: 5 ml delivers only 20 mg, half of the 40 mg required.
• 15 ml: 15 ml would deliver 60 mg, exceeding the prescribed dose.
• 20 ml: 20 ml would deliver 80 mg, double the dose needed.
• 25 ml: 25 ml would deliver 100 mg, more than twice the required amount.

A syrup has a concentration of 20 mg in every 5 ml. What volume must be given to deliver a 40 mg dose?

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