+0  
 
0
55
1
avatar

If a girl 5 feet tall could walk around the equator, how many feet further would the top of her head travel than her feet? Assume that the earth is a sphere. Express your answer in terms of pi.

 

Thanks!

 Aug 3, 2021
 #1
avatar+2204 
+1

Assume that the radius of the Earth is r feet. 

She travels the circumfrence of the Earth, which is 2*pi*r. 

However, when we count her head instead of her feet, the radius gets increased by 5 feet. 

(2*pi*(r+5)) - (2*pi*r) = 10pi

 

=^._.^=

 Aug 3, 2021

12 Online Users

avatar
avatar
avatar