Please help: Math question..getting anxious..

hi~

is there part of the question missing? there is not enough info for me to try and figure the ml/hr for this question.

Here is the question:

Child weighs 30kg, what is the hourly flow rate in mL? The answer is supposedly 71.

Actually Im not leaving anything out because there are constants: 24 hours in a day and 60 minutes in an hour.

I calculated it this way :

30ml times 60 minutes equal 1800, then I divided 1800 by 24 hours but this gave me 75 (but the answer is supposedly 71).

They 'Lippincott- PN' page 368 gave this as the way to do it: A Formula::

100ml/kg for the first 10 kg then

500ml/kg for the next 10 kg then

20 ml/kg for each kg above 20

then add. It looks like this:

100 (10) = 1000 ml per day

50(10)= 500ml per day

20(10) =200 ml per day

(those tens are a breakdown of the number given which is thirty)

THEN add

100 + 500+ 200=1700 ml/day

Finally

1700 divided by 24 = 71

I just thought there might be another shorter way. Not sure if the way I did it was or would be considered correct. I decided to just study their way to make sure. If anyone can figure another way other than Lippincotts, I would love to hear.

Suzanne I considered the way you said and you are correct when it applies to a solution not with weight or so says the book. This was why I found it so unusual.