Area of a circle of radius 5 cm isA- 60 cm 2B- 78-5 cm 2C- 50 cm 2D- 42 cm 2

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Standard VI

Physics

Area

Area of a cir...

Question

Area of a circle of radius 5 cm is

60 c m^{2}

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78.5 c m^{2}

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50 c m^{2}

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42 c m^{2}

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Solution

The correct option is B $78.5 c m^{2}$
Given, radius of circle, $r = 5 c m$
Area of a circle, $= π r^{2}$ ,
where $π = 3.14$
$∴ A r e a = 3.14 \times 5^{2} = 3.14 \times 25 = 78.5 c m^{2}$

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Area of a circle of radius 5 cm is

The correct option is B 78.5 cm2Given, radius of circle, r=5 cm Area of a circle, =πr2, where π=3.14 ∴Area=3.14×52=3.14×25=78.5 cm2

The correct option is B $78.5 c m^{2}$
Given, radius of circle, $r = 5 c m$
Area of a circle, $= π r^{2}$ ,
where $π = 3.14$
$∴ A r e a = 3.14 \times 5^{2} = 3.14 \times 25 = 78.5 c m^{2}$