Question

The pressure at two points in a liquid in pascal are P
and 2P. The piston attached to the mouth of the liquid
is given a push with pressure 2 Pa. The respective
pressures at the two points now are in the ratio
P-2/
P+2
(1) 2P-2/
2P+2
(3)P-1/
P+1
2P+1
(4) 20-1
​

Answer 1

The ratio of the pressures at the two points 2p + 2 / 2p + 1 i.e. 4 : 3

Explanation:

• The pressure should be added at the 2 point  when it is being applied at the mouth of the liquid.
• Since the pressure are different at the 2 points , we can consider them to be at depths.  
• The pressure at point 1

• 2 Pa + 1 Pa = 3 Pa at point 1  

• The pressure at point 2

• 2 Pa + 2 Pa = 4 Pa at point 2  
• Thus the ratio  2p + 2 / 2p + 1 i.e. 4 : 3