Two narrow bores of diameter 5.0 mm and 8.0 mm are joined together to form a U-shaped tube open at both ends. If this U-tube contains water, what is the difference in the level of two limbs of the tube. [Take surface tension of water T = 7.3 $\times 10-2 Nm-1, angle of contact = 0, g = 10 ms2 and density of water = 1.0 \times 103 kg m-$3]