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An ideal fluid flows through a pipe of c...

An ideal fluid flows through a pipe of circular cross section made of two sections with diameters 2.5 cm and 3.75 cm. The ratio of the velocities in the two pipes is

A

`9:4`

B

`3:2`

C

`sqrt(3): sqrt(2)`

D

`sqrt(2) : sqrt (3)`

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