A constriction in a pipe reduces its diameter from 40 cm to
A constriction in a pipe reduces its diameter from 4.0 cm to 2.0cm. Where the pipe is narrow the water speed is 8.0m/s. Where it is wide the water speed is:
A. 2.0m/s
B. 4.0m/s
C. 8.0m/s
D. 16m/s
E. 32m/s
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