https://examkhata.com/class-8-mathematics-model-activity-task-january-2022-answer-%e0%a6%85%e0%a6%b7%e0%a7%8d%e0%a6%9f%e0%a6%ae-%e0%a6%b6%e0%a7%8d%e0%a6%b0%e0%a7%87%e0%a6%a3%e0%a7%80-%e0%a6%97%e0%a6%a3%e0%a6%bf%e0%a6%a4/