Question

how can i concentrate on study

Answer 1

minimize watching TV and other activities... read good books... minimize social networking... study well

Answer 2

To improve your concentration takes a little time and effort, but it can be worth it. In my experience you can make noticeable improvement in a relatively short time .You need a very quiet place to concentrate on study .
a study spot is somewhere in your house where the only thing you do there is study. your body and your mind associate activities with certain places. Studying in bed is a bad idea, because when you get in bed your mind thinks "sleep"..Your mind and body will start to expect that at a certain time and place, you will study.
When you learn a new skill, memorize information, or develop a new habit, the connections in your brain change.

hope it's help u