A U-tube with both ends open to the atmosphere is partially filled with water. Oil, which is immiscible with water. Is poured into one side until it stands at a distance of `10 mm` above the water level on the other side. Meanwhile the water rises by `65mm` from its original level (see diagram). The density of the oil is: A. `425 kg m^(-3)`B. `800 kg m^(-3)`C. `928 kg m^(-3)`D. `650 kg m^(-3)`

A U-tube with both ends open to the atmosphere is partially filled wit

1.	A U-tube with both ends open to the atmosphere is partially filled with water. Oil, which is immiscible with water. Is poured into one side until it stands at a distance of `10 mm` above the water level on the other side. Meanwhile the water rises by `65mm` from its original level (see diagram). The density of the oil is: A. `425 kg m^(-3)`B. `800 kg m^(-3)`C. `928 kg m^(-3)`D. `650 kg m^(-3)`
Answer» Pressure is same at same level `BC:` `P_(a) + rho_(0)g (10 + 65 + 65) = P_(a) rho_(w)g (65+ 65)` `rho_(o) = (13 xx 1000)/(14) = 928 kg//m^(3)`

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