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प्रश्न
The radius of spherical balloon increases from 8 cm to 12 cm. The ratio of the surface areas of balloon in two cases is ______.
विकल्प
2 : 3
3 : 2
8 : 27
4 : 9
MCQ
रिक्त स्थान भरें
उत्तर
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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