What is the circumference of a circle with radius 2 r units-A- - rB- 2 - rC- - r2D- 4 - r

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

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Standard IX

Mathematics

Circumference of a Circle

What is the c...

Question

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

$π$ r

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2 $π$ r

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$π r^{2}$

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4 $π r$

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Solution

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

The correct option is D
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.