A water tank resting on the floor has two small holes vertically one above the other. The holes are h₁ cm and h₂ cm above the floor. How high does water stand in the tank if the
jets from the holes hit the floor at the same point?

• A

  $({\mathrm{h}}_1+{\mathrm{h}}_2)$

• B

  $({\mathrm{h}}_2-{\mathrm{h}}_1)$

• C

  $\frac{{\mathrm{h}}_1^2+{\mathrm{h}}_2^2}{2}$

• D

  $\left(\frac{{\mathrm{h}}_2^2-{\mathrm{h}}_1^2}{2}\right)$