Added the solution for "Calculate the volume of a pyramid. [#920]"

54NPWF/R9tDQu.cs

@@ -0,0 +1,27 @@
+using System;
+
+class Program
+{
+    static void Main()
+    {
+        double baseArea, height, volume;
+
+        Console.WriteLine("Enter the base area of the pyramid: ");
+        if (!double.TryParse(Console.ReadLine(), out baseArea))
+        {
+            Console.WriteLine("Invalid input. Please enter a valid number for the base area.");
+            return;
+        }
+
+        Console.WriteLine("Enter the height of the pyramid: ");
+        if (!double.TryParse(Console.ReadLine(), out height))
+        {
+            Console.WriteLine("Invalid input. Please enter a valid number for the height.");
+            return;
+        }
+
+        volume = (1.0 / 3) * baseArea * height;
+
+        Console.WriteLine($"The volume of the pyramid is: {volume}");
+    }
+}