In a water supply system, water flows in from pipes 1 and 2 and goes o – McqOptions

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1.	In a water supply system, water flows in from pipes 1 and 2 and goes out from pipes 3 and 4 as shown. If all the pipes have the same diameter, which of the following must be correct?
A.	the sum of the flow velocities in 1 and 2 is equal to that in 3 and 4
B.	the sum of the flow velocities in 1 and 3 is equal to that in 2 and 4
C.	the sum of the flow velocities in 1 and 4 is equal to that in 2 and 3
D.	the flow velocities in 1 and 2 is equal to that in 3 and 4
Answer» B.

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