Question

A pole $10m$ high cast a shadow $10m$ long on the ground, then the sun's elevation is:

• A. ${60}^{\circ }$
• B. ${45}^{\circ }$
• C. ${30}^{\circ }$
• D. ${90}^{\circ }$

Answer 1

Answer: (B)

${45}^{\circ }$

In $△BAC,$

$\Rightarrow \tan \theta =\frac{AB}{BC}=\frac{10}{10}=1$

$\Rightarrow \theta ={45}^{\circ }$

Hence, the answer is ${45}^{\circ }.$