This is a 30,60,90° triangle where the hypotenuse is equal to 4 meters and the slant height is opposite the 60° angle
The ratios of the sides and their opposite angle for this type of triangle are:
1,30°, √3, 60°, and 2, 90° so the relationship we need is:
x/4=√3/2 multiply both sides by 4
x=2√3