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प्रश्न
If the ratio of the sides of two cubes are 2 : 3, then ratio of their surface areas will be
विकल्प
4 : 6
4 : 9
6 : 9
16 : 36
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उत्तर
4 : 9
Explanation;
Hint:
Ratio of the surface area of cubes = 4a12 : 4a22
= a12 : a22
= 42 : 92
= 4 : 9
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