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प्रश्न
The volume of a cube is 729 cm3. Find its total surface area.
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उत्तर
Let a be the one edge of a cube.
Volume = a3
729 = a3
93 = a3
9 = a
a = 9 cm
Total surface area = 6a2 = 6 x 92 = 486 cm2
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