UPSC Civil Service Exam Questions - Engineering

Q1:

In a rectangular channel, the depths of flow before and after the hydraulic jump are respectively 0.2 m and 1.2 m. What is the energy loss in the jump ?

A 1.042 m

B 2.084 m

C 3.126 m

D 4.168 m

ANS:A - 1.042 m

What is the formula? Can anyone explain please explain me?