Question

I'm stuck in the middle of the problem.

A1V1=A2V2

the question: A 6cm diameter pipe is 3.5 m off the ground. The water flows of the pipe at 6m/s. A ground fire is at 11m in front of the pipe. what size reducer pipe must be added to make the water travel far enough to put out the fire?

:: now this is what I did
I know it's asking for the second diameter, which we can get it by solving A2 first

I found time, then used velocity=delta X/ time
i got v= 13.02

now I know I have to use the A1V2=A2V2 and solve for the second area to get the diameter, but I'm missing v1!

Answer 1

@aaronq Any idea?

Answer 2

@jim_thompson5910