Someone help please! Thank you^ explain the steps to get to the answer also. giving brainliest btw

10 feet

Step-by-step explanation:

Dimensions are:

Length = 60 + x ft.

Breadth = 30 ft.

Perimeter = 200 feet.

⇒ 2(l + b) = 200

⇒ 2(60 + x + 30) = 200

⇒ 2(90 + x) = 200

⇒ 180 + 2x = 200

⇒ 2x = 200 - 180

⇒ 2x = 20

⇒ x = 10.

Therefore, length of the gate = 10 feet.

Hope it helps!

The answer is 20 because her fence is 200 total so if you do 60 times 2 + 30 times 2 you get 180 200-180 = 20 sorry if i wrong