10. There are two identical small holes of area of cross-section a on the opposite sides of a tank containing a liquid of density ρ . The difference in height between the holes is h. Tank is resting on a smooth horizontal surface. Horizontal force which will has to be applied on the tank to keep it in equilibrium is
(a) ghρa
(b) (2gh)/(ρa)
(c) 2ρagh
(d) (ρgh)/a
Answer-c
(19)