Water flows through a fire hose of diameter 6.40 cm at a speed of 5.9 m/s. Find the flow rate of the fire hose in L/min?

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Water flows through a fire hose of diameter 6.40 cm at a speed of 5.9 m/s. Find the flow rate of the fire hose in L/min?

(The Answer is 1,140 L/min) i need help solving it.)

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Answer 1 · 2017-05-02T23:22:41

I got the same $1140L/min$

Explanation:

I would use the fact that the flow rate $R$ is related to the cross cectional area and velocity as:
$R=Av$
considering a velocity $v=5.9m/s=590(cm)/s$
and a cross sectional area of:
$A=pi*(d/2)^2=pi(6.40/2)^2=32.17cm^2$
we get:
$R=590*32.17=18980.3(cm^3)/s$
we need to convert it ito $L/min$
We know that:
$1L=1000cm^3$
and
$1min=60sec$
so we get:
$R=(18980.3/10000)/(1/60)=1138.8~~1140L/min$

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Water flows through a fire hose of diameter 6.40 cm at a speed of 5.9 m/s. Find the flow rate of the fire hose in L/min?

(The Answer is 1,140 L/min) i need help solving it.)

1 Answer

Explanation:

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