At 0600 hours a one litre bag of saline solution is set to run through an infusion pump at a rate of 70ml/hr. at 1400 hours the rate is increased to 80ml/hr. at what time will the bag be completely empty? answers in both 24hr notation and the usual a. m/p. m notion with working out shown

Question

Mathematics

Skylar Johnson

18 May, 05:58

At 0600 hours a one litre bag of saline solution is set to run through an infusion pump at a rate of 70ml/hr. at 1400 hours the rate is increased to 80ml/hr. at what time will the bag be completely empty? answers in both 24hr notation and the usual a. m/p. m notion with working out shown

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Mcduff · Answer 1

0600 means 6:00 am

1400 means 2:00 pm

70 ml = 0.07 litre

interval from 0600 to 1400 equals to 8 hours

At 1400 bag will still contain 1-8·0.07=0.44 litre of saline solution.

The rest will run for

0.44:0.08=5.5 [hour]

1400+5.5h=1930

Answer: Bag will be completely empty at 1930 (7:30 pm).