Question

why do we study chemistry physics and the tough questions of maths, is it did have any help

Answer 1

chemistry ; physics and maths are really important in our career.

Answer 2

Maths, Physics and Chemistry are useful if one wants to be a scientist or engineer. One could be a scientific writer or teacher or lecturer or professor.

They are tough. Life is not so easy as in the previous century. There is a lot of competition. So one has to learn tough subjects.