<PRE><B>Question 948416</B>
Width=W; Length=L=6W; Area=A=L*W
{{{L*W=864 cm^2}}} Substitute for L
{{{6W*W=864 cm^2}}}Divide each side by 6
{{{W^2=144 cm^2}}} Find the square root of each side
{{{W=12 cm}}} ANSWER 1: The width is 12 cm.
L=6W=6(12 cm)=72 cm  ANSWER 2: The length is 72 cm.
CHECK:
Area=L*W
864 sq cm=72 cm * 12 cm
864 sq cm=864 sq cm

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