Question

Pls solve 2 and 3. Its urgent

Answer 1

Answer:

2) CSA of hemisphere= 693 sqcm

3) volume of hemisphere = 718.66

Step-by-step explanation:

2)

volume of hemisphere = 2/3 π r×r

CSA of hemisphere = 2π r×r

$volume \: of \: hemisphere \: \frac{2}{3} \pi {r}^{3} = 2425 \frac{1}{2} \\ {r}^{3} = 2425.5 \times \frac{3}{2} \times \frac{7}{22} \\ {r}^{3} = \frac{50935.5}{44} \\ {r}^{3} = 1157.625 \\ r = \sqrt[3]{1157.625} \\ r = 10.5 \\ \\ csa \: = 2\pi {r}^{2} \\ = 2 \times \frac{22}{7} \times 10.5 \times 10.5 \\ = 693$

3)

TSA of hemisphere = 462 sqcm

$tsa \: = 3\pi {r}^{2} = 462sqcm \\ 3 \times \frac{22}{7} \times {r}^{2} = 462 \\ {r}^{2} = 462 \times \frac{1}{3} \times \frac{7}{22} \\ {r}^{2} = 49 \\ r = \sqrt{49} \\ r = 7 \\ \\ volume \: of \: hemisphere = \frac{2}{3} \pi {r}^{3} \\ = \frac{2}{3} \times \frac{22}{7} \times 7 \times 7 \times 7 \\ = \frac{15092}{21} \\ = 718.66$