Question

a cone is on a hemisphere,whose combined diameter is 14cm,if height of the cone is 7cm,then find T.S.A

Answer 1

Step-by-step explanation:

hope it may be helpful for y

Answer 2

Answer:

525.17cm^2

Step-by-step explanation:

TSA= CSA of Cone + CSA of hemisphere

Given,

Diameter = 14cm,

Radius = 7cm

Using slant height formula,

$= > \sqrt{ {r}^{2} + {h}^{2} } \\ = > \sqrt{ {7}^{2} + {7}^{2} } \\ = > 7 \sqrt{2} cm \\ \\ csa \: of \: cone \: = \pi \: r \: l \\ = > \frac{22}{7} \times 7 \times 7 \sqrt{2} \\ = > 154 \sqrt{2} \\ = > 154 \times 1.41 \\ = > 217.14 {cm}^{2} \\ \\ csa \: of \: hemisphere = 2\pi {r}^{2} \\ = > 2 \times \frac{22}{7} \times 7 \times 7 \\ = > 308 {cm}^{2}$

TSA= CSA of cone + CSA of hemisphere

TSA= 217.14 + 308

$tsa = 525.17 {cm}^{2}$