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प्रश्न
Fill in the blank in the following so as to make the statement true:
1 cu. km = ........ cu. m
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उत्तर
\[\text { 1 cu km = 1 km }\times 1 km \times 1 km\]
\[ = 1000 m \times 1000 m \times 1000 m ( \because 1 km = 1000 m)\]
\[ = 1000000000 m^3 \]
\[ = {10}^9\text { cu m }\]
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