A little boy is flying a kite

A little boy is flying a kite. The string of the kite makes an angle of 30o with the ground. If the height of the kite is h = 24 m, find the length (in meters) of the string that the boy has used.

Its source gives only the correct option, without the working.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #74982