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Suppose the radius of the Earth is given to be 6378.01 km. Express the circumference of the Earth in m with 5 significant figures.

Round to 5 sig figs with trailing zeros --> 40074000

Answer :

cjmejiab

The mathematical description that fits to find the circumference of a circle (Approximation we will make to the earth considering it Uniform) is,

[tex]\phi = 2\pi r[/tex]

Here,

r = Radius

The radius of the earth is 6378.01 km or 6378010m

Replacing we have that the circumference of the Earth is

[tex]\phi = 2\pi (6378010m)[/tex]

[tex]\phi = 40074000 m[/tex]

[tex]\phi = 40074*10^3 m[/tex]

Therefore the circumference of the Earth in m with 5 significant figures is [tex]40074*10^3 m[/tex] and using only trailing zeros the answer will be [tex]40074000m[/tex]

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