Question

(b) The pressure in a water pipe in the ground floor of a building is 4 ×105 Pa., but three floors up it is only 2
×105 Pa.
Calculate the height in meters, between the ground floor and third floor.
(The water in the pipe may be assumed to be stationary; density of water = 1 ×103 kg/m3).

Answer 1

Ans:3m

Let H1 be the distance between tank and ground floor.

Let H2 be the distance between tank and 1st floor.

H1-H2=h (Distance between the 2 floors)

d=density of water=1000kg/m^3

dgH1 = 4*10^4

dgH2 = 1*10^4

dg(H1-H2)=3*10^4

dgh=3*10^4

dh=3*10^3

h = 3m

Answer 2

Answer:

The third floor would have the water pressure of 3*105

Explanation:

Seeing as the it doubles by going up two stories, the water pressure would be in the middle of 2 and 4 which = 3. Therefore being 3x105 is the answer.