Question

if area of hemisphere is 28,000m2 find the diameter of hemisphere​

Answer 1

Step-by-step explanation:

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Answer 2

$\boxed{ \mathbf \green{CSA \:of \: hemisphere \: = \: 2\pi \: {r}^{2} }} \\ \\ \mathbf \red{Given \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: } \\ \\ \mathbf{CSA \:of \: hemisphere \: = \: 28000 \: {m}^{2} } \\ \\ \mathbf{2 \pi \: {r}^{2} \: = \: 28000 } \\ \\ \mathbf{2 \times \frac{22}{7} \times {r}^{2} = 28000 } \\ \\ \mathbf{ {r}^{2} = \frac{28000 \times 7}{2\times 22} } \\ \\ \mathbf{r \: = \: \sqrt{4454.54} } \\ \\ \mathbf{r \: = \: 66.7 \: m} \\ \\ \boxed{ \mathsf \red{diametre \: = \: 2 \times radius}} \\ \\ \mathbf{diametre \: = \: 2 \times 66.7} \\ \\ \boxed{\mathbf \red{ \therefore \: \: diametre \: = \: 133.4 \: m}}$