Water is moving with a speed of 5.18 ms−1 through a pipe with a cross-sectional area of 4.20 cm2. The water gradually descends 9.66 m as the pipe increase in area to 7.60 cm2. The speed of flow at the lower level is
3.0 ms−1
5.7 ms−1
3.82 ms−1
2.86 ms−1
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