The duration of each paper in the CBSE Class 10 board exams varies depending on the subject. The Central Board of Secondary Education (CBSE) has set specific time limits for each subject to ensure that students have sufficient time to complete their exams. Let's take a closer look at the duration of each paper:

1. bMathematics Exam:
- Duration: 3 hours
- This paper generally consists of 80 marks for theory and 20 marks for internal assessment. Students are given 3 hours to complete the entire paper, including solving mathematical problems and answering theory-based questions.

2. bScience Exam:
- Duration: 3 hours
- The Science exam is divided into two parts: Theory and Practical. The theory part carries 60 marks, while the practical part carries 20 marks. The remaining 20 marks are allocated for internal assessment. Students must complete the entire paper within the given 3-hour time frame.

3. bSocial Science Exam:
- Duration: 3 hours
- The Social Science paper consists of 80 marks for theory and 20 marks for internal assessment. Students are required to answer questions based on History, Geography, Political Science, and Economics within the given time limit.

4. bEnglish Language and Literature Exam:
- Duration: 3 hours
- The English Language and Literature paper is divided into two sections: Section A (Reading) and Section B (Writing and Grammar). Students must complete both sections within the given 3-hour time frame. The paper carries a total of 80 marks.

5. bHindi Course A and Hindi Course B Exam:
- Duration: 3 hours
- Both Hindi Course A and Hindi Course B exams have a duration of 3 hours. These papers assess the students' understanding of the Hindi language, including grammar, literature, and comprehension skills.

6. bOther Subjects:
- Duration: 2 or 3 hours
- For subjects like Information Technology, Home Science, Foundation of Information Technology, etc., the duration may vary between 2 and 3 hours, depending on the specific subject and its respective syllabus.

It is important for students to manage their time effectively during the board exams to ensure they can complete all the questions within the given duration. Practicing previous years' question papers and adhering to the time limits will help students develop a better understanding of the paper pattern and improve their time management skills.