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A = lw = 13 x 5 = 65
Re-arrange this equation: L=length W=width H=height S=surface area S = 2(LW+HW+HL) S/2 = LW+HW+HL (S/2) - LW = HW+HL (S/2) - LW = H(W+L) ((S/2) - LW)/(W+l) = H
Divide the perimeter by 2 and subtract the length to get the width. Multiply the length by the width to get the area. P=2L+2W P-2L=2W (P/2)-L=W A=LW
Area = length times width A = LW 100 m^2 = L(11 m) = 9.090909091
fyou would do 11.2 x 2.5, since A(area)=lw (length x width). the answer you would get is 28 units2 (area is always squared).