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Answer:

3rd option

Step-by-step explanation:

The volume (V) of a sphere is calculated as

V = [tex]\frac{4}{3}[/tex]πr³ ( r is the radius )

Given diameter = 4 then r = 4 ÷ 2 = 2 cm

V = [tex]\frac{4}{3}[/tex]π × 2³ = [tex]\frac{4}{3}[/tex]π × 8 = [tex]\frac{32\pi }{3}[/tex] cm³

combined volume = [tex]\frac{32\pi }{3}[/tex] + 20π = [tex]\frac{32\pi }{3}[/tex] + [tex]\frac{60\pi }{3}[/tex] = [tex]\frac{92\pi }{3}[/tex] cm³

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