anonymous
  • anonymous
A building casts a shadow 168 meters long. At the same time, a pole 5 meters high casts a shadow 20 meters long. What is the height of the building?
Mathematics
katieb
  • katieb
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Mathhelp346
  • Mathhelp346
42
anonymous
  • anonymous
how did you get 42?
Mathhelp346
  • Mathhelp346
|dw:1328681879036:dw|

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anonymous
  • anonymous
|dw:1328684511946:dw| \[\theta = \tan^{-1}\frac{5}{20}=14.036 degree\] x {height of building }=\(\tan \theta \times 168 = 42 meter\) which is the same of first and second answer but with explaining
anonymous
  • anonymous
i have another process, and it's using ratio and proportion. |dw:1328693204503:dw|

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