diff --git a/solve_cylinder_rt.py b/solve_cylinder_rt.py
index ee315cd..3bb85f0 100755
--- a/solve_cylinder_rt.py
+++ b/solve_cylinder_rt.py
@@ -19,7 +19,7 @@ def matchAV(dim_cyl,dims):
   AVc=cylinder(r,t)
   return AVp-AVc
 
-def return_hr(w,h,L):
+def solve_cylinder(w,h,L):
   r,t=fsolve(matchAV,[1,2],args=[w,h,L])
   print('A %1.2f x %1.2f x %1.2f parallelipiped'%(w,h,L) )
   print('has the same surface area and volume as a cylinder')