Two cells P and Q are contiguous. Cell P has osmotic pressure of 20 atm and turgor pressure of 10 atm. Cell Q has osmotic pressure of 10 atm and turgor pressure of 5 atm. This results in:

DPD= OP-TPOP= Osmotic pressureTP= Turgor pressureDPD of cell P= 20-10=10atmDPD of cell Q= 10-5= 5atmWater always flows from lower DPD to higher DPD. In this case cell Q has lower DPD as compared to cell P. Therefore, water will flow from cell Q to cell P.