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A flagpole is 30 feet high, and a mailbox is 3.5 feet high. The mailbox casts a shadow that is 5.25 feet long. How long is the flagpoles shadow at the same time?

Guest Apr 5, 2017
 #1
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Solved by a proportion......

 

Mailbox shadow length / Mailbox Height  = Flagpole Shadow Length / Flagpole Height

 

5.25 / 3.5  =  S /  30       cross-multiply

 

30 * 5.25  =  3.5 S

 

157.5  =  3.5 S       divide both sides by 3.5

 

157.5 / 3.5  =  S  =  45 ft  = Flagpole Shadow Length

 

 

cool cool cool

CPhill  Apr 5, 2017

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