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A 4-foot-tall mailbox casts a shadow that is 2.4 feet long. At the same time, a nearby street lamp casts a shadow that is 8 feet long. How tall is the street lamp?

 Jun 27, 2020
 #1
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its 4.8 feet long because since the one was 4 feet high and the second one is 8 feet it would be doubled

 
 Jun 27, 2020
 #2
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Set up a ratio

 

4 ft mailbox is to 2.4 ft shadow       as      x  ft lamp is to 8 ft shadow

4/2.4  = x/8    

                            solve for   x = lampost height

 
 Jun 27, 2020

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