Water Flowing Through a Pipe Suddenly Comes to a Section

Multiple Choice

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 36m/s, what is its speed in this smaller section?

A) 49 m/s
B) 42 m/s
C) 31 m/s
D) 27 m/s