Iam studying hard but even after that iam not able to score good marks in mocks what should I do quant section seem very tough for me

You need to study with TIME materials initially, go with solved examples first and try to solve 10 problems on your own daily, at the end of each week give mock tests for the chapters you have studied. Rectify your mistakes and dont repeat them, keep revision at hand everytime. Once you're prepared wiyh all chapters go for full mock test only for Quants Section. Try to solve maximum mock tests so to optimize results and score well. With this you will go far ahead. All the best ahead and keep posted for doubts.

Keep Calm and try to identify your mistakes. Are you faulting in speed or accuracy? Is speed, practice more. If accuracy, speed up your calculations by mugging some basics like tables, square roots, cube roots, squares and cubes etc. All the best!!