A liquid flows in the tube from left to right as shown in figure. A1 and A2 are the area of cross - sections of the portions of the tube as shown. If speed of liquid in these portions be V1&V2 respectively . The ratio of speeds V1V2 will be
A
A1A2
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B
A2A1
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C
√A2A1
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D
√A1A2
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Solution
The correct option is BA2A1 From the equation of continuity, Flow rate is constant V1A1=V2A2 So, V1V2=A2A1