The total surface area of a hemisphere is 462 cm2 .The diameter of this hemisphere is:

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The total surface area of a hemisphere is 462 cm2 .The diameter of this hemisphere is:

A28 cm

B21 cm

C7 cm

D14 cm

Answer:

D. 14 cm

Read Explanation:

The total surface area of a hemisphere = 3πr² 3πr² = 462 3 × 22/7× r² = 462 r² = 49 r = 7 cm Diameter = 2r = 2 × 7 = 14 cm

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