The flow rate of water in a 3-m-wide horizontal open channel is being measured with a 0.25 -m-high sharp-crested rectangular weir of equal width. If the water depth upstream is \(0.9 \mathrm{~m}\), the flow rate of water is

(a) \(1.75 \mathrm{~m}^{3} / \mathrm{s}\)

(b) \(2.22 \mathrm{~m}^{3} / \mathrm{s}\)

(c) \(2.84 \mathrm{~m}^{3} / \mathrm{s}\)

(d) \(3.86 \mathrm{~m}^{3} / \mathrm{s}\)

(e) \(5.02 \mathrm{~m}^{3} / \mathrm{s}\)