Question

Hii
please tell me this question​

Answer 1

Answer:

u have to apply the formula of volume of sphere here and it's done

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

$surface \: area \: of \: a \: sphere \: = 4\pi \: r ^{2} \\ 4 \times \frac{22}{7}r {}^{2} = 154cm ^{2} \\ r {}^{2} = \frac{154}{4} \times \frac{7}{22} \\ r {}^{2} = \frac{49}{4} \\ r = \sqrt \binom{49}{4} \\ r = \frac{7}{2} = 3.5 \: cm \\ volume \: of \: the \: sphere \: = \frac{4}{3}\pi \: r {}^{2} \\ \frac{4}{3} \times \frac{22}{7} \times 3.5 {}^{3} \\ \frac{88}{21} \times 42.875 = 179.67cm$

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