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The total surface area of a hemisphere is 75π cm2. Find its radius

A. 5.0 cm

B. 7.0 cm

C. 8.5cm

D. 12.0cm

**Comments**

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The Total surface area of Hemisphere = 3πr^{2}

Where r is the radius.

Since the total surface area of Hemisphere is given as 75π,

75π = 3πr^{2}

Divide both sides by 3π

r^{2} = 75π/3π

r^{2} = 25

Take the square root of both sides,

r = 5

**Ans A**

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