How much study hours are usually needed to clear ipcc grp 1?

In my opinion, it is totally depends upon your good planing towards may 12 exam in terms of no of days and preparation of a time table and maximum possible hardwork.

If you want to start preparation then start at the earliest

no need to worry 

try to make a time table for urself according to ur priorties

u will be successful

cheers

Think positive and what you have not done any thing at your past is not relevant what you going to do now is your future.. So you are responsible for your future

Dont worry.

Starts study today onwards till May 16th 2012 with ur own study plan.

U will get success.