Question : If water is frozen to become ice, its volume is increased by 10%, then if the ice is melted to water again, its volume will be decreased by:
Option 1: $9$%
Option 2: $9\frac{1}{11}$%
Option 3: $8$%
Option 4: $9\frac{1}{2}$%
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Correct Answer: $9\frac{1}{11}$%
Solution :
Let the volume of water be 100.
After freezing, it increases by 10% = 110
After melting, it decreases by = $\frac{10}{110}×100$ = $9\frac{1}{11}$%
Hence, the correct answer is $9\frac{1}{11}$%.
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