Final answer:
The length of major arc RST is approximately 1,075 15 π yards.
Step-by-step explanation:
To find the length of a major arc on a circle, we can use the formula:
Length of Arc = (Central angle / 360) * Circumference of Circle. In this case, the central angle is 215° and the radius of the circle is 50 yards. The formula becomes: Length of Arc = (215 / 360) * (2 * π * 50).
Evaluating this expression, we find that the length of major arc RST is approximately 1,075 15 π yards.