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 $\mathrm{T}=7.3 \times 10^{-2} \mathrm{Nm}^{-1}$, angle of contact $=0, \mathrm{~g}=10 \mathrm{~ms}^{-2}$ and density of water $=1.0 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-2}$ ]