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Question
The radius of spherical balloon increases from 8 cm to 12 cm. The ratio of the surface areas of balloon in two cases is ______.
Options
2 : 3
3 : 2
8 : 27
4 : 9
MCQ
Fill in the Blanks
Solution
The radius of spherical balloon increases from 8 cm to 12 cm. The ratio of the surface areas of balloon in two cases is 4 : 9.
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