help me
ans should be well explained

Perimeter:-
[tex]\\ \sf\longmapsto 2(L+B)[/tex]
[tex]\\ \sf\longmapsto 2(40+30)[/tex]
[tex]\\ \sf\longmapsto 2(70)[/tex]
[tex]\\ \sf\longmapsto 140m[/tex]
Area
[tex]\\ \sf\longmapsto LB[/tex]
[tex]\\ \sf\longmapsto 40(30)[/tex]
[tex]\\ \sf\longmapsto 1200m^2[/tex]
= 2(Length + Breadth)
= 2(40 + 30)
= 2(70)
= 140m
= Length × Breadth
= 40 × 30
= 1200m^2
Therefore, The perimeter of the rectangle is 140m and the area of the rectangle is 1200m^2.