The formula is:
Volume = Base area x height
We can plug in what you know, "h" represents height.
5/24 = 1/5 x h
Your goal is to isolate the variable, so divide each side by 1/5, which is the same as multiplying with 5.
5/1 x 5/24 = 5/1 x 1/5 x h
Simplify:
25/24 = 1 x h
1h is the same as h, so you've isolated the variable!
h = 25/24
25/24 is the same thing as 1 and 1/24
Thus, h = 1 and 1/24
Let me know if you need more help! :)