A U-tube is partially filled with water....

A U-tube is partially filled with water. Oil which does not mix with water is next poured into one side, until water rises by 25 cm on the other side. If the density of oil `0.8g//cm^(3)`. The oil level will stand higher than the water by

6.25 cm

12.50cm

18.75cm

25.00cm

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