A kite 3

A kite is flying at a height of 60 m above the ground. The string attached to the kite is temporarily tied to a point on the ground. The inclination of the string with the ground is 60°. Find the length of the string, assuming that there is no slack in the string.

Correct answer:

l =  69.28 m

Step-by-step explanation:

$$\begin{gathered} h=60\text{m} \\ \alpha =60{}^{\circ } \\ \sin \alpha =h:l \\ l=\frac{h}{\sin \alpha }=\frac{h}{\sin 60°}=\frac{60}{\sin 60°}=\frac{60}{0.866025}=69.28=69.28\text{m} \end{gathered}$$

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