For a catchment area of 12 hectares, the S-curve (or s-hydrograph) due to rainfall intensity of 1 cm/hour is given by Q = 3 – e-t (t – 1) Where, t is in hour and Q in m3/second).
The ordinate of a 3-hour unit hydrograph at t equals to 5 hours for the given catchment is ______
(in m3/s up to two decimal places)Enter numerical value using the virtual keypad. Round off where necessary.