Answer: 36 or sqrt(1296)
Step-by-step explanation:
l * w = a(864)
We can substitute w in this equation for 2/3 * l.
l * (2/3 * l) = 864 or 2/3 * l ^2
Multiply by the denominator 3...
and then divide by what's left of the fraction 2
(864)*3/2 = 1296
1296 = l^2
This can also be seen as:
sqrt(1296) = l
36 = l
