A red ribbon is tied tightly around the earth at the equator. How much more ribbon would you need if you raised the ribbon 1 ft above the equator everywhere? (You don't need to know the radius of the earth to solve this problem.)

~Could you also include an explanation of how you went about solving this. Thanks!

Question

A red ribbon is tied tightly around the earth at the equator. How much more ribbon would you need if you raised the ribbon 1 ft above the equator everywhere? (You don't need to know the radius of the earth to solve this problem.)

~Could you also include an explanation of how you went about solving this. Thanks!

anonymous · Answer

I can give you an answer as a factor of the current lenght of the ribbon.

anonymous · Answer

Okay~ that may help

anonymous · Answer

let original radius of earth at equator = R ft
ribbon required = circumference =  C1 = 2πR

when it is lifted 1 ft above the equator, now radius = (R + 1) ft
now ribbon required = circumference = C2 = 2π(R + 1) = 2πR + 2π

Increase in length of ribbon = C2 - C1 = (2πR + 2π) - 2πR = 2π = 2*3.14 = 6.28 ft

anonymous · Answer

@ noru

pls see my solution.......

no values are required........

anonymous · Answer

i saw... i confused my formula you are right

anonymous · Answer

Yeah~ Harkirat that makes sense. Thank you so much! I appreciate it! :)

anonymous · Answer

u r always welcome....☺