Heyy Guys Bet You Can’t Answer This!?
A string is wrapped around the Earth’s equator and the two ends of the string just touch. Now suppose that another string is tied to the original string so that it is 100 feet longer. If this new string is placed around the equator and pulled tight so that it is suspended in air, how high will the string be above the ground?
Answer choices:
a. Not even high enough to squeeze an atom underneath the string.
b. Just high enough to roll a bowling ball underneath the string.
c. Just high enough to drive a Mack truck underneath the string.
d. 100 feet high.
[[ I’m Thinking D. How About You Guys?? ]]
Favorite Answer
I’m going to guess the answer is… C.
Here’s the math to support it:
Alright, first we need to know some general information.
The circumference of the earth = 24,859.82 miles
Convert that to feet = about… 131259849.6 feet
and…some simple geometry equations…
C = 2piR
Ok, so what you are looking for is the difference in radius because that will tell you the space between the crust of the earth and the +100ft string.
So…
first you find the radius of the earth
131259849.6 = 2piR
R = 20890653.89 feet
Next, you find the NEW radius if you added 100 feet to the circumference so…
131259849.6 + 100 = 2piR
R = 20890669.81 feet
Finally, you can calculate the difference by subtraction.
20890669.81 – 20890653.89 =15.918 feet
So…unless I am making the wrong assumptions on the height of the truck…
If it’s not, then you need to rethink
Maybe it’s just me.
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