The discharge through a channel of trapezoidal section is maximum when
(A) Width of channel at the top is equal to twice the width at the bottom
(B) Depth of channel is equal to the width at the bottom
(C) The sloping side is equal to half the width at the top
(D) The sloping side is equal to the width at the bottom
(A) Width of channel at the top is equal to twice the width at the bottom
(B) Depth of channel is equal to the width at the bottom
(C) The sloping side is equal to half the width at the top
(D) The sloping side is equal to the width at the bottom