# Flow Rate & Velocity

1. May 4, 2007

### grscott_2000

Question solved

Last edited: May 4, 2007
2. May 4, 2007

### HallsofIvy

Staff Emeritus
No, if the diameter of the pipe is .6 m then its radius is .6/2= .3 m.

You should have 5/(pi* .3* .3)= 17.7 m/s.

Yes, this is exactly the same thing: diameter= 2*radius so (diameter)^2= 4*radius. Canceling the "4" in the numerator and denominator gives exactly what you have above.

Although you have the correct answer, there is a typo on the left: "pi" should not be squared.