As per linear equation, the height of the flag pole is 30 feet.
<h3>What is a linear equation?</h3>
A linear equation is an equation that has one or multiple variables with the highest power of the variable is 1.
Given, Brian is 6 feet tall and cast a 4 feet shadow.
Therefore, the ratio of Brain and it's shadow is
= 6/4
= 1.5
A flag pole cast a 20 foot shadow.
Therefore, the height of the flag pole is
= 20 × 1.5 feet
= 30 feet.
Learn more abut linear equation here: brainly.com/question/12508646
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