Question

Find the total surface are of a hemisphere of radius 10cm. Also find its volume?​

Answer 1

Answer:

given radius hemisphere is 10 centimetre

total surface area is 2 part R square plus fire square

three x 3.14 in bracket 10 square is equal =942cm 2

Answer 2

$\bf{\underline{\underline{Question:-}}}$

Find the total surface are of a hemisphere of radius 10cm. Also find its volume ?

$\bf{\underline{\underline{Given:-}}}$

• Radius of hemisphere is 10cm

$\bf{\underline{\underline{To\:Find:-}}}$

• Total surface area of hemisphere = ?
• Volume 9f hemisphere = ?

$\bf{\underline{\underline{Formula:-}}}$

• T.S.A of hemisphere = $\bf<strong> </strong><strong>3</strong><strong>π</strong><strong>r</strong><strong>^</strong><strong>2</strong><strong> </strong>$
• Volume of hemisphere = $\bf \frac{2}{3}πr^3$

$\bf{\underline{\underline{Solution:-}}}$

★ Finding Total surface area :-

$\sf :→T.S.A\:of\: hemisphere = 3πr^2$

$\sf :→ T.S.A\:of\: hemisphere = 3×3.14×10×10$

$\sf :→ T.S.A\:of\: hemisphere = 9.43×100$

$\sf :→ T.S.A\:of\: hemisphere = 943 cm^2$

$\bf{\underline{\underline{Hence:-}}}$

• T.s.A of hemisphere is 943 cm³

___________________________

★ Now Finding volume of hemisphere :-

$\sf :→ Volume\:of\: hemisphere = \frac{2}{3}πr^3$

$\sf :→ Volume\:of\: hemisphere = \frac{2}{3}×3.14×10×10×10$

$\sf :→ Volume\:of\: hemisphere= 2×1.046×1000$

$\sf :→ Volume\:of\: hemisphere = 2.093×1000$

$\sf :→ Volume\:of\: hemisphere = 2093 cm^3$

$\bf{\underline{\underline{Hence:-}}}$

• The volume of hemisphere is 2093 cm³