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Two flagpoles cast shadows at the same time. A 12-foot pole casts an 8-foot shadow. If a nearby pole casts a 6-foot shadow, how tall is it (in feet)?
A$8$
B$9$
C$10$
D$4$
Answer & Solution
Correct answer: B. $9$
Similar right triangles give $12/8 = h/6$. Cross-multiply: $8h = 72$, $h = 9$ feet.
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