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A river 5 meters wife and 1 meter deep is flowing at 2m/s. A little downstream...

A river 5 meters wife and 1 meter deep is flowing at 2m/s. A little downstream it widens to 9 meterswide and is 1.4 meters deep. how fast is it flowing there? m/s.
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Answer #1

Initial area of cross section of flow

= (5 m)×(1 m)

= 5 m2

Final area of cross section of flow

= (9 m)×(1.4 m)

= 12.6 m2

By continuity equation

(2 m/s)×(5 m2)=v2 ×(12.6 m2)

Solving we get,

v2 =0.79 m/s  

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