Final answer:
It takes 4 minutes to infuse 6 ml of fluid when the infusion rate is 1.5 ml per minute.
Step-by-step explanation:
To calculate the time required for infusing 6 ml, we can use the formula:
Time (in minutes) = Volume (in ml) / Infusion Rate (in ml/minute)
Plugging in the given values: Time = 6 ml / 1.5 ml/minute = 4 minutes