Question

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was 36 m/s, which is its speed in this smaller section?

Answer 1

Answer 2

Here is what I solved before, please modify the figures as per your question. Please let me know if you have further questions. Ifthis helps then kindly rate 5-stars.

Water flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. If the speed of the water in the larger section of the pipe was 28 m/s, what is its speed in this smaller section?

answer

amount of flow is constant

so area x speed = constant

a1v1 = a2 v2
a1/a2 = v2/v1

r1^2/r2^2 = v2/v1 ( raidus iof section )

100^2/86^2 = v2 / 28

v2 = 37.85 m/s