Units of a Circle's Radius

Geometry Level 1

If the radius of a circle is 2.33 cm, then how long is the radius in kilometers?

2.33E-5 2.33E-3 2.3E-4 2.33E-4

Carl Jay Tadios by Carl Jay Tadios , 21, Philippines

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2 solutions

100 c m = 1 m 100~cm=1m

1000 m = 1 k m 1000~m=1~km

2.33 c m ( 1 m 100 c m ) ( 1 k m 1000 m ) = 0.0000233 k m = 2.33 × 1 0 − 5 k m 2.33~cm\left(\dfrac{1~m}{100~cm}\right)\left(\dfrac{1~km}{1000~m}\right)=0.0000233~km=2.33 \times 10^{-5}~km

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Sagar Shah
Nov 14, 2015

100 cm = 1 m

100000 cm = 1000 m

100000 cm = 1 km

=>2.33 cm = (2.33)/100000 km or 2.33E-5 km.

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