What is the circumference of a circle with radius 2r units?

2 $π$ r

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$π r^{2}$

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4 $π r$

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$π$ r

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Solution

The correct option is C
4 $π r$

Given,
Radius of the circle = 2r units
Circumference of a circle with radius r $= 2 π \times 2 r = 4 π r$ units.

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What is the circumference of a circle with radius 2r units?

The correct option is C 4πr Given, Radius of the circle = 2r units Circumference of a circle with radius r =2π×2r=4πr units.

The correct option is C
4 $π r$

Given,
Radius of the circle = 2r units
Circumference of a circle with radius r $= 2 π \times 2 r = 4 π r$ units.