A direct runoff hydrograph due to a storm idealized into a triangular shape has a peak flow rate of 60 m3/s occurring at 25 hours from its start. If the base width of this hydrograph is 72 hours, and the catchment area is 777.6 km2, the runoff from the storm is
1
1 cm
2
2 cm
3
5 cm
4
10 cm