Answer:
Option (3) will be the answer.
Step-by-step explanation:
Area of a triangle = 
= 
Since, m∠A + m∠B + m∠C = 180°
60° + 60° + m∠C = 180°
m∠C = 180° - 120°
m∠C = 60°
Therefore, ΔABC is an equilateral triangle.
AB ≅ BC ≅ AC ≅12
Sin 60° = 

CD = 6√3
Now area of ΔABC = 
=
= 62.35
≈ 62.4 square units
Therefore, Option (3) will be the answer.
The answer would be 0.375
Go-rite: 12.75 / 3 = 4.25 (go-rite is $4.25 per pound)
Green zone: $4.50
4.50- 4.25= 0.25
Go-rite is cheaper by .25