Hello,

JEE is one of the most demanding examination, varies aspirants preparation duration is about 2 - 6 years.

JEE covers a very vast Syllabus and in-depth fundamentals should be cleared as the difficulty level of JEE is quite high.

So, if a student has spent his 11th and 12th standard with a great academic grip then he/she secure a little amount of probability of cracking JEE in 30 days but for the an average or above student its near to impossible.

know more about JEE - JEE Main 2021

JEE Advanced 2021

JEE Main online Preparation

Hope this helps,

All the best !