Answer:
16 feet long.
Step-by-step explanation:
By the Pythagoras theorem:
20 = L^2 + 12^2 where the length = L.
L^2 = 20^2 - 12^2
= 400 - 144
= 256
L = sqrt 256
= 16 feet.
12x2 20x2 =40+24=64
length = 140 meters
width = 27 meters
length=x
width=y
6y-22=x
xy=3780
√34
it would be radical 34.
y=-.5x+4