Answer :
[tex]tan\ \alpha = \frac{350}{750} = \frac{7}{15} \approx0.4667\ \ \ and\ \ \ \alpha <90^0\ \ \ \Rightarrow\ \ \ \alpha \approx62^0\\\\Ans.\ the\ angle\ of\ elevation\ from\ to\ the\ top\ of\ the\ building\\.\ \ \ \ \ \ is\ about\ 62^0[/tex]
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