c
\(\begin{array}{l}
Total\,Area = {A_1} + {A_2} + ..........{A_7}\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = A + A + ............7\,times\\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,37.03\,{m^2}\\
Addition\,of\,7\,terms\,all\,having\,2\,terms\,\\
beyound\,decimal,\,so\,final\,answer\,must\,\\
have\,2\,terms\,beyond\,decimal\,(as\,per\,\\
rules\,of\,significant\,digits)
\end{array}\)