An average rainfall of 16 cm occurs over a catchment during a period of 12 hours with uniform intensity. The unit hydrograph (unit depth 1 cm, unit duration = 6 hr) of the catchment rises linearly from 0 to 30 cumec in six hours then fall linearly from 30 to 0 in 12 hr. ϕ index of the catchment is 0.5 cm/hr. Base flow in the river is 5 cumec. The peak discharge resulting from direct run-off hydrograph will be ______ cumec.