Goddammit cylinders can't have negative radii/height I'm so salty

Grade 10/Math/MPM2DZ/Math Oral Presentation Questions/Unit 5: Rational Expressions.md

@@ -64,4 +64,5 @@ $` = \dfrac{rh}{2(h+r)}`$
 
 ### Question 3 b)
 
-The restrictions by looking at the fraction are $`h =\not -r, r =\not -h`$, also $`r =\not 0`$.
+The restrictions are that $`r`$ and $`h`$ are dimensions of a real cylinder, i.e., that $`r > 0`$ and $`h > 0`$, as the denominator cannot be zero.
+