Find the surface area (in cm^2 ) of a sphere of diameter 7 cm . - Quantitative Aptitude MCQ Competitive Exam 2026 | ExamTest.live

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Find the surface area (in cm^{2}) of a sphere of diameter 7 cm .

Solution & Step-by-step Explanation

Given diameter d = 7 cm, so radius r = \frac{7}{2} cm .The surface area of a sphere is given by A = 4 π r^{2} . A = 4 \times \frac{22}{7} \times (\frac{7}{2})^{2} A = 4 \times \frac{22}{7} \times \frac{49}{4} A = 22 \times 7 = 154 cm^{2}

Try it yourself before checking the explanation above.

Find the surface area (in cm^{2}) of a sphere of diameter 7 cm .

154

124

143

155

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