It is use by Eye Care Professionals To check the eyesight of a person.
If u would have visited a eye care centre u would have noticed a chart like this--
If a person can see all the letters from a distance his eyesight is Perfect.If that person misses a letter or a line from the grid eye treatment or spectacles are given to the person for improving their eyesight
125 ml/hour x X hours = 1000 ml
X = 1000 ml/ 125 ml/hour
X = 8
It will take 8 hours
Your answer is true according to my teacher