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28. A liquid flows in a tube from left to right as shown in figure.

 A1 and A2   are the cross-sections of the portions of the tube as shown. Then the ratio of speeds v1 / v2 will be

(a) A1 / A2                  (b) A2/ A1

(c) √A2 / √A1         (d) √A1 / √A2

Answer-b

(9)

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