A building 84 ft high casts a 231-ft shadow. Sarah casts an 11-ft shadow. The triangle formed by the building and its shadow is similar to the triangle formed by Sarah and her shadow. How tall is Sarah?

1 Answer
Jun 11, 2017

Sarah is 3.86 ft.

Explanation:

This is a proportion question.

81/231=x/11

You cross multiple and get:

891=231x

Divide by 231:

891/231=cancel(231x)/cancel231

x=3.86