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Which of these has the largest surface area, all with radius 5 cm? (CSA = curved surface area, TSA = total surface area)

Class 9Surface Area of a SphereMensuration

AA sphere
BA hemisphere (CSA)
CA hemisphere (TSA)
DA flat circle

Step-by-Step Solution

Sphere = 4*π*

r^{2}

; hemisphere TSA = 3*π*

r^{2}

; hemisphere CSA = 2*π*

r^{2}

; circle = π*

r^{2}

. The sphere (4*π*

r^{2}

) is largest.

Answer: A) A sphere

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