Ali, Babu, Chinmoy, Drabir and Ebadur are five athletes taking part in a race. Ali finishes ahead of Babu, Chinmoy finishes behind Drabir, Ali comes in behind Ebadur, Babu is ahead of Drabir. Who comes in between Ail & Drabir?

Correct Answer: Babu
বর্গের diagonal বা কর্ণ = √2a; যেখানে a = বাহুর দৈর্ঘ্য। এবং বর্গের ক্ষেত্রফল a2 বর্গ একক তাহলে a2 = n∴a = √nDiagonal = √2 .√n = √2n একক