An infusion set delivers 15 drops per ml. How many drops per minute are needed to give 1000 ml in 480 minutes?
Answer and explanation
Correct answer: D. 31.2 drops/min
- Step 1: Drops per minute = volume x drops per ml / minutes. Step 2. 1000 x 15 / 480 = 31.2. Answer: 31.2 drops/min. Why not the others: 32000 drops/min: the drop factor was used as a divisor. 2.1 drops/min: this is ml per minute, the drop factor was left out. 62.5 drops/min: the result was doubled.
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