Question

form of a hollow hemisphere mounted by a hollow cylinder the diameter of the hemisphere is 14 cm and the total height of The vessel is back in centimetre find the inner surface of the vessel​

Answer 1

For a cylinder,

r = 7cm,

h = 13 - 7 = 6cm

For a hemisphere,

r = 7cm

Required inner surface area of vessel

= CSA of cylinder + CSA of hemisphere

= $\sf{2πrh + 2π{r}^{2} = 2πr(h + r)}$

= $\sf{2 \times \frac{22}{7} \times 7(6 + 7)}$

= ${\boxed{\sf{572 {cm}^{2}}}}$