There are two holes, each of cross-sectional area a, on the opposite side of a wide rectangular tank containing a liquid of density $\mathrm{\rho }$. When the liquid flows out of the holes, the net force on the tank is [h is the vertical distance between the two holes.]

• A

  2$\mathrm{\alpha \rho gh}$

• B

  $4\mathrm{\alpha \rho gh}$

• C

  $0.5 \mathrm{\alpha \rho gh}$

• D

  $\mathrm{\alpha \rho gh}$