A U–tube contains some mercury in its two limbs. A column of gylecrine 100 mm. Length is poured over mercury in left hand limb. Oil is poured over mercury in right hand limb till the upper layer of oil and glycerine in the two limbs is same. What is length of oil column? R.D of glycerine = 1.3; R.D of oil = 0.8; Density of mercury = 13.6 g / c.c.
