This textbook has been written according to the new revised syllabus of West Bengal University of Technology for the first year (second semester) B Tech. and B Arch. students. This book can also be treated as a supplementary book of BE/BTech. and B Arch. students of other Universities/Institutes. It contains various types of problems along with worked out model problems which are essential to the Engineering/Technological and B Arch. students. Multiple choice questions with answers have been provided in this textbook which will be helpful for GATE and other competitive examinations.