If the total surface area of the hemisphere is 27- cm2- then its radius is

We know that, total surface area of hemisphere =3π r^2 Given that, 3π r^2 = nbsp;27π ⇒ r^2 = 9 ⇒ nbsp; r = 3 cm ∴ The radius of the hemisphere is 3 cm. ...

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard IX

Mathematics

T.S.A of a Hemisphere

if the total ...

Question

if the total surface area of the hemisphere is $27 π c m^{2}$ , then its radius is

27 cm

No worries! We‘ve got your back. Try BYJU‘S free classes today!

3 cm

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

9 cm

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 3 cm
We know that,
total surface area of hemisphere
$= 3 π r^{2}$

Given that,
$3 π r^{2} = 27 π$
$\Rightarrow r^{2} = 9$
$\Rightarrow r = 3 c m$

$∴$ The radius of the hemisphere is 3 cm.

Suggest Corrections

Similar questions

Q. If the radius of a hemisphere is

2 x

, then its total surface area is given by:

Q. If the volume of a hemisphere is four times its total surface area, the radius is

Q. If the curved surface area of a solid hemisphere is

2772 s q . c m

, then find its total surface area(in

c m^{2}

Q. If the radius of a solid hemisphere is 5 cm, then find its curved surface area and total surface area. (

π = 3.14

)

Q. If the volume of a hemisphere is four times its total surface area, then find its radius
(in cm)?

Join BYJU'S Learning Program

if the total surface area of the hemisphere is 27π cm2, then its radius is

The correct option is B 3 cmWe know that, total surface area of hemisphere =3πr2 Given that, 3πr2=27π ⇒r2=9 ⇒r=3 cm ∴ The radius of the hemisphere is 3 cm.

if the total surface area of the hemisphere is $27 π c m^{2}$ , then its radius is

The correct option is B 3 cm
We know that,
total surface area of hemisphere
$= 3 π r^{2}$

Given that,
$3 π r^{2} = 27 π$
$\Rightarrow r^{2} = 9$
$\Rightarrow r = 3 c m$

$∴$ The radius of the hemisphere is 3 cm.