Question

the total surface area of hemisphere is 7392 cm .find its diameter​

Answer 1

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Answer:

$tsa \: of \: hemisphere \: = 7392 \\\\ = > 3\pi {r}^{2} = 7392 \\ \\ = > \frac{22}{7} \times {r}^{2} = 2464 \\\\ = > {r}^{2} = \frac{2464 \times 7}{22} \\\\ = > {r}^{2} = 784 \\\\ = > {r} = \sqrt{784} \\\\ = > {r} = 28 \: cm$