Make Post Full Width

Hii Plz i need help sorry first i have bad eng

how i can make all posts (just posts not homepage) when u click in post u will see post full width

this is my probleme : http://i57.tinypic.com/2ykf4sp.jpg

and i want like this : http://i57.tinypic.com/24e6fe9.jpg

theme: dilapidated

& thanks