AP EAMCET Medical 24 Apr 2019 Shift 1 Paper

A U-tube open at both the ends is partially filled with a liquid (A) of density 950 kgm−3. Another liquid (B) of density 820 kgm−3 is poured into one of the arms and it forms a column of length 10 cm as shown in the figure. If the arm into which liquid B is poured is shielded from any air motion, the speed with which air should be blown across the top of the other arm till the levels of the two liquids are at same height in ms−1 is
(Density of air is 1.3 kgm−3, Acceleration due to gravity = 9.8 ms−2)