Question

2 pipe of diameter
50cm,length600m and
diameter35cm, 250m length is to b
replaced. The equivalent length of
pipe of diameter 30cm is,​

Answer 1

Answer:

36 is answer

please brainlist kov

Answer 2

Answer:

The length of the replaced pipe is $162.32$ m.

Explanation:

• When pipes are connected in series, an equal volume of fluid flows in each of the pipes.
• In a series combination, the head loss is added for individual pipes to get the head loss for the replaced pipe.

The formula for the head loss is given by:

$H=\frac{fLV^{2} }{2gD}$

where $f$ is the Darcy friction factor

           $L$ is the pipe length.

           $V$ is the velocity.

           $D$ is the pipe diameter.

Step 1:

We substitute  $V=\frac{Q}{\pi \frac{D^{2} }{4} }$  in the above head loss formula.

As we know that head loss is added for individual pipes.

$H_{f} =H_{1}+H_{2}$

$\frac{L1}{d1^{5} } =\frac{L2}{d2^{5} } + \frac{L3}{d3^{5} }$

$\frac{L1}{0.30^{5} } =\frac{600}{0.50^{5} } + \frac{250}{0.35^{5} }$

Step 2:

$\frac{L1}{0.30^{5} } =19200 + 47599.21$

$L1=162.32$ m

So, the length of the replaced pipe is $162.32$ m.