The diagram shows a pipe of uniform cross section in which water is flowing. The directions of flow and the volume flow rates (in 3cm3 /s ) are shown for various portions of the pipe. The direction of flow and the volume flow rate in the portion marked A are:
Correct answer: D. ↓ and 15cm3 /s
- A. ↓ and 3cm3 /s
- B. ↑ and 7cm3 /s
- C. ↑ and 11cm3 /s
- D. ↓ and 15cm3 /s
Explanation
The sum of flow rates moving inwards is 6+3+5+4= 18 cm3 /sFlow rates moving outwards=3 cm3 /sNet flow rate=15 cm3 /sThe direction of flow through A must be downwards (↓) to balance the flow
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