It is not a matter of hours study, It is a matter of smart preparation.
You need to learn all concepts of each section of SBI PO Exam.
Regular practice will help you in qualifying the exam.
it's all about speed test... when you reached on a level where you solve around 80 questions in given time with 95%accuracy than there is noone gonna stop you to get selected in this prestigious organization. after clearing basics try n giving at least 4 st's per day. all the best
10 hours; 2 hours maths, 2 hours English, 2 hours Reasoning, 2 hours General Awareness and 2 hours for mock test.
2 hrs quants 2 hrs reasoning 2 hrs eng
It is not about hours and minutes. This exam is all about your quickness and sharpness to solve the questions correctly in less span of time. If your concepts are outstanding, you have good knowledge of short tricks, if you can easily attempt 65-80 questions than you don't have to study for whole day. Spend quality time on each subject and this will surely helps you to crack SBI PO Prelim.