Question

The width of a rectangle is two-thirds of its length, and its area is 216 square meters. What is the length?
12 m
18 m
27 m

Answer 1

\[\Large x * {2x \over 3} = 216 \]
Solve it.

Answer 2

12?

Answer 3

L = L
w = (2/3)L
A = 216

L x w = A

Substitute A and w, then solve for L

L x (2/3)L = 216

(2/3)L^2=216

L^2=324

L=18, therefore w=(2/3)L=(2/3)18=12

Answer 4

\(\Large x^{2} = 324\)
\(\Large x = 18\)

Width is 12, as 2x/3 = 12