251664.72 rounded to the nearest km

Question

im strugging
my answers on test are
12,762
25,512
62,884
6,339,700

approximated the earths equator is 40,074 kilometers. round to the nearest km...
please help im only on problem11 on my test

Answer 1

What exactly is your question?

Answer 2

the question is:
The circumfrence of the earth at the equator is about 40,074 kilometers. Find the diameter of the earth to the nearest km.
i did the math
40074 x 22/7 (3.14) x 2 and i got 251664.72..
now i need to round

Answer 3

Are you trying to round 251664.72 km to the nearest km? If so, what are your choices?

Answer 4

a 12,762
b 25,512
c 62,884
d 6,339,700

Answer 5

i think its b

Answer 6

None of the choices you listed are equal to 251664.72 km rounded to the nearest km.

Answer 7

Also, the formula for calculating diameter from circumference is:

d = C / π

I do not believe that you calculated the diameter of Earth correctly given the data in your original question.

Answer 8

oh?
i did 40,074 x 3.14 and i get 125832.36

Answer 9

As Leo pointed out
D = C/π = 12755.95.... km
which rounded to the nearest km is 12,756

the closest choice given to that would be a) 12,762
I have no idea where that came from.

Answer 10

corona…man said this:
i did 40,074 x 3.14 and i get 125832.36
But that's not what Leo told him to do. He ended up with AREA, not CIRCUMFERENCE.

And if I can recognize that … !!

Answer 11

40,074/ pi = 12,756
close to A. I used 3.14156 for pi