Q. A tank 5m high is half filled with water and then is filled to the top with oil of density$0.85\ gcm^{- 3}$. The pressure at the bottom of the tank, due to these liquids is
A) $1.85\ g\ dynecm^{- 3}$
B) $89.25\ g\ dynecm^{- 3}$
C) $462.5\ g\ dynecm^{- 3}$
D) $500\ g\ dynecm^{- 3}$
Explanation
(c) Pressure at the bottom $\rho = (h_{1}d_{1} + h_{2}d_{2})g$
$= \lbrack 250 \times 1 + 250 \times 0.85\rbrack g$
$= 250\lbrack 1.85\rbrack g$
$= 462.5\ g\ dyne/cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.