Question

The surface area of a sphere is 676 cm2

, then its radius i​

Answer 1

$\huge\underline\mathfrak{solution}$

Given, surface area of sphere=$676 \: {cm}^{2}$

$\longrightarrow4\pi {r}^{2} = 676 \: \\ \longrightarrow 4 \times \frac{22}{7} \times {r}^{2} = 676 \\\longrightarrow {r}^{2} = \frac{676 \times 7}{22 \times 4} \\ \longrightarrow {r}^{2} = \frac{169 \times 7}{22} \\ \longrightarrow {r}^{2} = 53.772 \\ \longrightarrow r = \sqrt{53.772}\: cm$

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Answer 2

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YOUR ANS IS:—

Surface area of a sphere = 676 cm²

=> 4πr² = 676 cm²

=> 4 × 22/7 × r² = 676 cm²

=> r² = 676×7 / 4×22

=> r² = 53.77 cm²

=> r = 7.33 cm

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