A certain stretch of a lined trapezoidal canal for irrigation water supply has one vertical sidewall and the other 45° sloping wall. If it is to carry a design discharge of 30 m3/s with a velocity of 1 m/s, compute the flow depth and bed width of the canal for minimum lining area (in m units).
1
1.86, 3.26
2
3.96, 5.6
3
2.24, 4.15
4
1.69, 4.7