Btukfyl

I'm currently typing my dissertation. The requirement for text margin is top 2cm, right 2cm, left 4cm and bottom 2cm. My setting works for all pages, except the pages at which the chapter titles are located. Is there anyway to solve it? I'm using pdfLaTeX compiler.

**documentclass[12pt,a4paper]{report}



usepackage{amsmath, amsthm, amssymb}

usepackage{array}

usepackage{anysize}

usepackage{faktor} 

usepackage{placeins}

usepackage{float}

usepackage{enumerate}

usepackage{fancyhdr}%for page number font

usepackage{lmodern}%also for page number font

usepackage[pdftex]{graphicx}

usepackage{caption}

usepackage{booktabs, calc, cleveref}

usepackage{mathptmx}%Font: Times New Roman

usepackage{setspace}

usepackage[font={small},labelfont=bf]{caption}

usepackage[titles]{tocloft}

usepackage[notquote]{hanging}

usepackage{sectsty}.

  chapternumberfont{nohangcenteringlargeMakeUppercase} 

  chaptertitlefont{nohangcenteringlargeMakeUppercase}

  sectionfont{fontsize{12}{15}selectfont}

usepackage{tikz}

usepackage[final]{pdfpages}

usepackage[footskip=1cm]{geometry}

geometry{

   left=40mm,

   right=20mm,

   top=20mm,

   bottom=20mm,

 }

 %%%%%%%

renewcommand{cftchapleader}{cftdotfill{cftdotsep}}

renewcommandcftchappresnum{CHAPTER } 

   cftsetindents{chapter}{0em}{6em}      



pagestyle{fancy}

lhead{}

chead{}

rhead{}

lfoot{}

cfoot{}

rfoot{thepage}

renewcommand{headrulewidth}{0pt}

renewcommand{footrulewidth}{0pt}

 %%%%

fancypagestyle{plain}{

fancyfoot{}

fancyfoot[R]{fontsize{10pt}{10pt}selectfontthepage}

renewcommand{headrulewidth}{0pt}

renewcommand{footrulewidth}{0pt}}

pagestyle{plain}

%%%%

renewcommand{contentsname}{Table of Contents}

renewcommand{bibname}{REFERENCES}

%%%%%



setstretch{2}

%%%%%%%%%%%



begin{document}

pagenumbering{arabic} 

setcounter{page}{1}

%Chapter 1

chapter{MakeUppercase{INTRODUCTION}}



section{Background of study} 

Associating a group with a graph and finding relationships between them is 

an area of research that has generated much interest. Research on this 

subject aims at investigating relationships between groups and graphs and at 

exploring applications of one to the other.

newpage

The main contributions of this work

end{document}**