CBSE Class 10 Answered

The number of marks a student can score in any given subject depends on how well he/she has studied for it. There is no time limit which can guarantee a 100% result. Even one hour of a day spent with undivided attention on a subject can give the desired result.
Following are some guidelines that could help you score better in your English paper.

Syllabus: A clear understanding of the text is an obvious prerequisite. We encourage you to read the texts and understand their central ideas and the motivations of the characters, etc. You should also be able to give a personal response to some of the texts and poems we therefore encourage you to learn to appreciate literature and its role in enriching our lives.
In addition to studying the syllabus, you also need a good command over the language. This can be achieved only though a lot of reading and writing practice. 

Vocabulary: The more English books/novels/stories you read, the better you are positioned to answer vocabulary based questions correctly because reading increases and improves your vocabulary. Listening to documentaries, news channels and educational English shows will also enrich your language. 

Practice: Solve as many sample papers as you can to increase your familiarity with the paper pattern and to increase your writing speed. Practicing various styles of writing such as descriptive, narrative, persuasive or argumentative essays, letters, reports, dialogues, advertisements stories and debates will help you in the composition section.
We strongly suggest that you divide your day in such a manner that you can devote time to all subjects. Dividing your time equally ensures that you are in touch with all the subjects and have an opportunity to revise them regularly.