5. 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

(a)   3.0 ms^–1                                          (b)   5.7 ms^–1

(c)   3.82 ms^–1                                         (d)   2.86 ms^–1

Answer-d