GATE Civil Engineering (CE) 2019 Shift 2 Solved Paper

An inflow hydrograph is routed through a reservoir to produce an outflow hydrograph. The peak flow of the inflow hydrograph is ${\mathit{P}}_1$ and the time of occurrence of the peak is ${\mathit{t}}_{\mathit{I}}$. The peak flow of the outflow hydrograph is ${\mathit{P}}_0$ and the time of occurrence of the peak is to. Which one of the following statements is correct?