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Question 10The radius of a hemispherical balloon increases from 6 cm to 12 cm as air is being pumped into it. The ratio of the surface areas of the balloon in the two cases is:A) 1:4B) 1:3C) 2:3D) 2:1 |
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Answer» Question 10 The radius of a hemispherical balloon increases from 6 cm to 12 cm as air is being pumped into it. The ratio of the surface areas of the balloon in the two cases is: A) 1:4 B) 1:3 C) 2:3 D) 2:1 |
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