+0  
 
0
75
2
avatar

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
avatar+130 
-4

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
avatar+26907 
+1

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

41 Online Users

avatar
avatar
avatar