MCQ Practice Mathematics 📖 A certain sum of money at simple interest amount to Tk.1012 in 5/2 years and Tk.1067.20 in 4 years, the rate of interest per ... Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up