The Solution is Available on https://ioenotes.bikrampparajuli.com.np/2021/05/ioe-math-3rd-semester-solution-pdf.html
YouTube Videos [Extremely Recommended]
Chapter 1 - Determinants & Its Properties [20 Marks] [Medium D.]
Chapter 2 - Line, Surface and Volume Integrals [20 Marks] [Hard D.]
Chapter 3 - Laplace Transform [15 Marks] [Moderately Hard D.]
Chapter 4 - Linear Programming [15 Marks] [Easy D.]
Chapter 5 - Fourier Series [10 Marks] [Medium D]