So easy

Geometry Level 2

If the radius of a circle is 5.66 cm, what is the diameter of this circle in kilometer?

1.132E-3 1.132E-4 1.132E-5 1.32E-4

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1 solution

diameter = 2 ( 5.66 ) = 11.32 cm \text{diameter}=2(5.66)=11.32~\text{cm}

Now convert it to kilometers. \text{Now convert it to kilometers.}

11.32 cm ( 1 m 100 cm ) ( 1 km 1000 m ) = 0.0001132 km 11.32~\text{cm}\left(\dfrac{1~\text{m}}{100~\text{cm}}\right)\left(\dfrac{1~\text{km}}{1000~\text{m}}\right)=0.0001132~\text{km}

Note: Centimeters and centimeters cancels out. Similarly, meters and meters cancels out, so the remaining unit is kilometers.

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