Question : There is a 4% increase in volume when a liquid freezes to its solid state. The percentage decrease when solid melts to liquid again is:
Option 1: $3\frac{3}{13}$%
Option 2: $4$%
Option 3: $4\frac{1}{13}$%
Option 4: $3\frac{11}{13}$%
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Correct Answer: $3\frac{11}{13}$%
Solution :
Let the volume of liquid be 100.
After freezing, it increases by 4% = 104
After melting, it decreases by = $\frac{4}{104} × 100$ = $3\frac{22}{26}$ = $3\frac{11}{13}$%
Hence, the correct answer is $3\frac{11}{13}$%.
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