275 + 180 + 120 = 275 + 300 = 575
not 100% that this is right but this is my best guess. Hope this helps!!
the answer is in the photo
Answer:
<h2>Y = 22.56 cm </h2>
Step-by-step explanation:
To find the diameter Y of the circle we must first find the radius of the circle
Area of a circle = πr²
where
r is the radius
From the question
Area = 400cm²
Substitute the value into the above formula and solve for the radius
That's
400 = πr²
Divide both sides by π
We have

Find the square root of both sides

radius = 11.28 cm
Since we have the radius we can use it to find the diameter Y using the formula
diameter = radius × 2
radius = 11.28
Y = 11. 28 × 2
We have the final answer as
<h3>Y = 22.56 cm</h3>
Hope this helps you