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