Answer:
total drop per minute is 56
Step-by-step explanation:
Give data:
total capacity of bag 1 L = 1000 ml
Duration of infuse 6 hr
quantity at the time delivered is 20 gtts/ml
Drop per minute can be determined by using following relation
Drop per minute 
therefore total drop per minute is
Where is this triangle you speak of
Well, is just their difference, let's first convert the mixed fraction to "improper" and then subtract.

Translate the words into math and solve for x. Any questions let me know.