Question

The figure shows a liquid of given density flowing steadily in horizontal tube of varying cross-section. Cross sectional areas at A is 1.5 cm² , and B is 25 mm² , if the speed of liquid at B is 60 cm/s then (P_A – P_B) is

(Given P_A and P_B are liquid pressures at A and B points. 

Density ρ = 1000 kg m^-3

A and B are on the axis of tube 

(1) 175 Pa 

(2) 27 Pa 

(3) 135 Pa 

(4) 36 Pa

Answer 1

Correct option is (1) 175 Pa

From continuity theorem A₁ V₁ = A₂ V₂