Diameter of a nozzle from the speeds of water in the pipe and at the nozzle

1. A.
   $g\sqrt{\frac{V_1}{V}}$
2. B.
   $d\sqrt{\frac{V}{V_1}}$
3. C.
   $\frac{dV}{V_1}$
4. D.
   $\frac{V_1}{dV}$

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1. A.
   $d\sqrt{\dfrac{V}{V_1}}$
2. B.
   $d\sqrt{\dfrac{V_1}{V}}$
3. C.
   $\dfrac{dV}{V_1}$
4. D.
   $\dfrac{dV_1}{V}$

Tap an option to check your answer.