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Please answer both A. and B.


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Please answer both A. and B. Thank you!-example-1

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Answer: (b)-175 ft

Explanation:

In
\triangle ABC\ \text{and}\ \triangle CDE


\angle ACB=\angle ECD\quad [\text{vertically opposite angles}]\\\angle ABC=\angle CDE\quad [\text{Each angle is }90^(\circ)]\\\therefore \triangle ABC \sim\ \triangle CDE\quad [\text{by AA similarity criteria}]

(ii)for similar triangles, we can write


\Rightarrow (100)/(d)=(4x)/(7x)\\\\\Rightarrow d=100* (7)/(4)=175\ ft

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