Answer: C. 5 to 7 times its height
The length of hydraulic jump is roughly 5 to 7 times its height.
Length of hydraulic jump is the length along the channel in which jump phenomena occur. Or length of hydraulic jump can be stated that it is the distance between those two sections of which one is located just before the jump and another section is just after the hydraulic jump.
Length of the hydraulic jump generally varies 5 to 7 times of its height.
Height of the hydraulic jump is y2-y1.
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