If the curved surface area of a hemisphere is 8 - m2- then the radius is-

Let, the radius of the hemisphere be r. We know that, curved surface area of a hemisphere nbsp; =2π r^2 Given that, curved surface area of the hemisphere is ...

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Standard VI

Mathematics

Surface area of a sphere

If the curved...

Question

If the curved surface area of a hemisphere is $8 π m^{2}$ , then the radius is.

2 m

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4 m

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8 m

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6 m

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Solution

The correct option is A $2 m$
Let, the radius of the hemisphere be $r$ .

We know that, curved surface area of a hemisphere
$= 2 π r^{2}$

Given that, curved surface area of the hemisphere is $8 π m^{2}$ .

$\Rightarrow 2 π r^{2} = 8 π$
$\Rightarrow r = 2 m$

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If the curved surface area of a hemisphere is 8π m2, then the radius is.

The correct option is A 2 mLet, the radius of the hemisphere be r. We know that, curved surface area of a hemisphere =2πr2 Given that, curved surface area of the hemisphere is 8π m2. ⇒2πr2=8π ⇒r=2 m

If the curved surface area of a hemisphere is $8 π m^{2}$ , then the radius is.

The correct option is A $2 m$
Let, the radius of the hemisphere be $r$ .

We know that, curved surface area of a hemisphere
$= 2 π r^{2}$

Given that, curved surface area of the hemisphere is $8 π m^{2}$ .

$\Rightarrow 2 π r^{2} = 8 π$
$\Rightarrow r = 2 m$