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59. Water is flowing in a pipe of diameter 4 cm with a velocity 3 m/s. The water then enters into a tube of diameter 2 cm. The velocity of water in the other pipe is

(a)   3 m/s                                         (b)  6 m/s

(c)   12 m/s                                      (d)  8 m/s

Answer-c

(9)

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