Water flows through a horizontal 60 mm diameter galvanized iron pipe at a rate of 0.02 m3/s. if the pressure drop is 135 kpa per 10 m of pipe, do you think this pipe is
a) a new pipe,
b) an old pipe with somewhat increased roughness due to aging or
c) a very old pipe that is partially clogged by deposits. justify your answer.

pipe is old one with increased roughness

Explanation:

discharge is given as

V = 7.07  m/s

from bernou;ii's theorem we have

as we know pipe is horizontal and with constant velocity so we have

solving for friction factor f

f = 0.0324

fro galvanized iron pipe we have

reynold number is

Re = 378750

from moody chart

therefore new friction factor is less than old friction factoer hence pipe is not new one

now for Re = 378750 and f = 0.0324

from moody chart

we have

thus pipe is old one with increased roughness

can you make it more obvious. i can't see it properly

it was a fall down when it happens

explanation: