Actual length of the pole and the length of the shadow cast by the pole follow the proportional relationship.
Following this rule, 20 feet tall flagpole will cast 3.33 feet shadow.
If the length of the shadow = x feet
Proportional relationship will be defined by the expression,
[tex]\frac{\text{Actual height}}{\text{Length of the shadow}}\rightarrow \frac{6}{1}= \frac{20}{x}[/tex]
[tex]6x=20[/tex]
[tex]x=\frac{20}{6}[/tex]
[tex]x=3.33[/tex] feet
Therefore, length of the shadow cast by flagpole will be 3.33 feet.
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