Question

The cross-sectional area of a horizontal tube increases linearly along its length, as we move in the direction of flow. The variation of pressure, as we move along its length in the direction of flow (positive x-direction) is best represented by which of the following graphs?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

$A\propto x$ (given), Velocity $v\propto \frac{1}{x}$
$p+\frac{1}{2}\rho v^2=$ constant