Hi Zarin, thanks for submitting your answer for the Physic's quiz on Tanguar Haor. You used a formula and explained everything accordingly with very clear description. It was good read and easy for the admins to understand. Overall, nice answer. Here is the link for everyone to read your answer in more details and we attached a screenshot of your answer here also: https://drive.google.com/file/d/1EjQvSW3BIqVxPmsPsKHtpmK-VCtq4DXe/view?usp=drivesdk