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8
Water flows at a constant speed of 15 m/s through narrow section of the pipe. What is the
speed of water in the section of the pipe where its radius is twice of the initial radius? *
(A) 15 m/s
(B) 12 m/s
O (C) 7.5 m/s
O (D) 4 m/s

20
A gasoline pump fills a 80-L tank in 1 min 30 s. If the pump exit diameter is 4cm, what is the
average pump-flow velocity? *
0.0716 m/s
O 0.716 m/s
7.162 m/s
O none of the above

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