Question

total surface area of a hemisphere of radius 3.5 cm is (r=22/7)

Answer 1

$\huge\purple{Required \: Answer :}$

$\LARGE\bold{Total \: Surface \: Area - 33}$

$\huge\red{Explanation :}$

Total Surface Area -

$3\pi {r}^{2}$

of Hemisphere

$= 3 \times \pi \times ( {r}^{2} ) \: \\ = 3 \times \frac{22}{7} \times 3.5 \\ = 3 \times 22 \times 0.5 \: \\ = 66 \times 0.5 \: \: \: \: \: \: \: \: \: \\ = 33 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\huge{Thanks}$

Answer 2

Step-by-step explanation:

• total surface area of a hemisphere is
• $3\pi \: r ^{2}$

given radius =3.5 cm

so... total surface area of a hemisphere = 3 ×22/7 × 3.5 ×3.5

( 3.5can be written as 35/10 = 7/2 )

so...

total surface area of a hemisphere =3×22/7 × 7/2 ×7/2

= 3× 11×7/2

= (77×3 )/2

= 231/2 = 115.5 cm^2

hence..

THE total surface area of a hemisphere = 115.5 cm^2

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