added volume of frustum

mathgenerator/funcs/geometry/volume_frustum.py

@@ -0,0 +1,21 @@
+from .__init__ import *
+
+
+def gen_func(maxR1=20, maxR2 = 20, maxHeight=50, unit='m', format='string'):
+    h = random.randint(1, maxHeight)
+    r1 = random.randint(1, maxR1)
+    r2 = random.randint(1, maxR2)
+    ans = ((math.pi*h)*(r1**2 + r2**2 + r1*r2))//3
+
+    if format == 'string':
+        problem = f"Volume of frustum with height = {h}{unit} and r1 = {r1}{unit} is and r2 = {r1}{unit} is "
+        solution = f"{ans} {unit}^3"
+        return problem, solution
+    elif format == 'latex':
+        return "Latex unavailable"
+    else:
+        return r1, r2, h, ans, unit
+
+
+volume_frustum = Generator("Volume of frustum", 62, gen_func,
+                            ["maxR1=20","maxR2=20", "maxHeight=50", "unit='m'"])