# Which formula is used for measuring the rate of flow of liquid through pipes using the Venturimeter ??

Venturimeter is a device is used for measuring the rate of flow of liquid through pipes.

This formula is used to find the volume flow rate.

$V= a_1a_2\sqrt{\frac{2gh}{a_1^2-a_2^2}}$

For the above figure

a1 and a2 are an area of cross-section of tube A and B respectively

And v1 and v2 are the Velocities of the flow of liquid through A and B respectively.

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