The velocity of upper layer of water in a river is \( 36 \, \text{km h}^{-1} \). Shearing stress between horizontal layers of water is \( 10^{-3} \, \text{N m}^{-2} \). Depth of the river is __________ \( \text{m} \). (Co-efficient of viscosity of water is \( 10^{-2} \, \text{Pa s} \) )
