I think 50. I did it like this:
1.44L/24h is equivalent at 1440ml/24h wich is equivalent at 60ml/h wich is the same as saying 1ml/min. That's the V (urine flow).
Then you do the formula of Clearance of creatinine.
Cl: VxUrine concentration of creatinine
_________________________________
Plasma concentration of creatinie
Cl: 1x100
______
2
Answer is 50.
