now i am coming in 12th . can i clear iit jee? how many hours shoud i study? how mny marks shoud i get to clear iit ?

about 7-8 hours....atleast 200 to get in to iit...

You have to study for 7 hours other than school hours.

You should get 60% marks in each subject in 12th class.

you have to get more than 200 for good iit rank it also depends on the question paper the year you are appearing for iit-jee.

first of all be understand with all concepts properly. Do not have any doubt with you.

clear them immediately.

study with full concentration.

BEST OF LUCK.