A kite is flying at a height of 115 m. The thread attached to it is assumed to be stretched straight and makes an angle of 30° with the level ground. The length of the string is?

230 m

AC = length of string

Θ = angle of elevation

AB is the height of kite above ground

sin 30°  =      1       :        2

                  (AB)           (BC)

                     ↓                ↓

                   115          115 × 2 = 230 m