Question

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Answer 1

`403 + 40√(3)~~ ft^2`

Explanation:

`(20+√(3))(20+√(3)) = 20^2 + 2\cdot 20 \cdot √(3) + √(3)^2 = 400 + 40√(3) + 3 = 403 + 40√(3)`

Answer 2

a) 403 + 40√3 ft²

Explanation:

Given that,

→ l = 20 + √3 ft

→ w = 20 + √3 ft

Formula we use,

→ A = l × w

Then the required area will be,

→ (20 + √3) × (20 + √3)

→ (20 + √3)²

→ 403 + 40√3 ft²

Hence, option (a) is the answer.