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A person 5 feet 3 inches tall casts a 6-foot shadow. At the same time of day, a lamppost cast an 18-foot shadow. what is the height lamppost?

https://learning.k12.com/d2l/common/viewFile.d2lfile/Database/OTc5MTM2Ng/Q%20_10%20sem%20final%20part%202.jpg?ou=374067

A. 15.75 ft. 
B. 15.9 ft. 
C. 31.5 ft. 
D. 1.5 ft.

 Jun 6, 2018
 #1
avatar+16481 
+3

Just work this as a simple ratio problem:

5 ft 3 inches (5.25 ft)  is to 6 feet as  'x' is to 18 feet

5.25/6 = x / 18    solve for 'x'

5.25/6  * 18  = x

15.75 ft = x

 Jun 6, 2018

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