Angle of arc = 90°
Radius = 5m
Calculate the length of an arc with the following parameters.
Given the angle of arc is 90 degrees and the radius is 5m, we can calculate the length of the arc using the formula: 

Arc length = (angle/360) * 2πr

Substituting the given values,

Arc length = (90/360) * 2 * π * 5 

Arc length = 0.25 * 2 * π * 5

Arc length = 2.5π

Therefore, the length of the arc is 2.5π meters or approximately 7.85 meters.