If a circular railroad crossing sign has a diameter of 30in what should its areas be?
A = pi * r^2
A = 3.14 * 15 * 15
A = _______ sq. in.
Cap ms sue
To find the area of a circular railroad crossing sign, we can use the formula for the area of a circle: A = πr^2, where A is the area and r is the radius.
Given that the diameter of the circular sign is 30 inches, we can determine the radius by dividing the diameter by 2:
r = d/2 = 30/2 = 15 inches.
Now we can substitute the value of the radius into the formula to find the area:
A = π * r^2 = π * 15^2 = π * 225.
Since the value of π is approximately 3.14, we can multiply it by 225 to get the area:
A ≈ 3.14 * 225 ≈ 706.5 square inches.
Therefore, the area of the circular railroad crossing sign with a diameter of 30 inches should be approximately 706.5 square inches.