Question

the length of a rectangle is three times its width.
if the area of the rectangle 243 in^2, find its perimeter

Answer 1

Area=Length*Width


For this problem W=3L

so,

234 in\[^{2}\] =L*3L
\[243 \in ^{2}=3L ^{2}\]
243/3=L^2
L=9

The rest should be a standard perimeter equation relating the Length and Width that you just found.