tyeavey tyeavey

13-11-2018
Mathematics

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A flag pole has a 20ft shadow. At the exact same time a 5ft person has a 3ft shadow. How tall is the flag pole?

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wegnerkolmp2741o wegnerkolmp2741o

13-11-2018

This is a ratio problem

5ft x

---------- = ----------------

3ft shadow 20 ft shadow

using cross products

5 * 20 = 3 x

100 = 3x

divide by 3 on each side

100/3 = x

33 1/3 =x

The flag pole is 33 1/3 ft tall

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