Fix calculation of the kettle's lateral area

hirschmann · Jul 14, 2017 · 60505e9 · 60505e9
1 parent 8f0b85d
commit 60505e9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/kettle.py b/kettle.py
@@ -25,7 +25,7 @@ def __init__(self, diameter, volume, temp, density=1):
         height = (volume * 1000) / (math.pi * math.pow(radius, 2))
 
         # surface in m^2
-        self._surface = (2 * math.pi * math.pow(radius, 2) + 2 * radius * height) / 10000
+        self._surface = (2 * math.pi * math.pow(radius, 2) + 2 * math.pi * radius * height) / 10000
 
     @property
     def temperature(self):