(Solved): The cistern shown in the figure below has a diameter \( D \) that is four times the diameter \( d ...

The cistern shown in the figure below has a diameter \( D \) that is four times the diameter \( d \) of the inclined tube. The liquid in the inclined tube rises \( \ell=30 \mathrm{in} \). The angle \( \theta \) is \( 20^{\circ} \). The fluid's specific gravity is \( 0.85 \). Find the drop in the fluid level in the cistern. \[ h_{c}= \] Find the pressure difference, \( p_{A}-p_{B} \). \[ p_{A}-p_{B}=1 \] psi