Question

curved surface area of
area of a hemiphere share
diameter is 14 cm is​

Answer 1

Step-by-step explanation:

the Hemisphere is the half part of a sphere, therefore, the curved surface area is also half that of the sphere.

Solution :

radius =\frac{diameter}{2}=7cm

2

diameter

=7cm

Area of a hemisphere

= 2\pi \: r {}^{2}=2πr

2

= 2 \times \pi \times (7) {}^{2}=2×π×(7)

2

= 2 \times \frac{22}{7} \times 7 \times 7=2×

7

22

×7×7

= 2 \times 22 \times 7=2×22×7

= 308 \: cm {}^{2}=308cm

2

⇒The curved surface area of hemisphere is 308 cm².

Answer 2

DetailedAnswer:

Given :

Diameter of hemisphere is 14 cm

To find :

Curved surface area of a hemisphere

Formula :

${\purple{\boxed{\large{\bold{Curved\:Surface\:Area\:of\:a\:Hemisphere=2\pi\:r{}^{2}}}}}}$

Curved Surface Area of a Hemisphere=2πr²

⇒ the Hemisphere is the half part of a sphere, therefore, the curved surface area is also half that of the sphere.

Solution :

$radius =\frac{diameter}{2}=7cm$

Area of a hemisphere

= $2\pi \: r {}^{2}=2πr²$

= $2 \times \pi \times (7) {}^{2}=2×π×(7)²$

= $2 \times \frac{22}{7} \times 7 \times 7$

= $2 \times 22 \times 7$

= $308 \: cm {}^{2}=308cm²$

⇒The curved surface area of hemisphere is 308 cm².