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Option 2 : 2 only
Assumptions made in Hydraulic jump are:
1. Depth of flow before and after jump is uniform and pressure distribution is hydrostatic.
2. Length of jump is so small that frictional resistance can be neglected.
3. Bed is horizontal or slope is so small that weight of water component comprising the jump is small. Hence, neglected.
4. Before and after the jump flow is one dimensional.
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