Physics
Fluid-Mechanics
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Question

A cylindrical vessel is filled with water upto the height 1 m from the base. A small orifice is opened at some height in the cylinder and the water level is reduced to height of orifice in 20 sec. If the base area of the cylinder is 100 times the area of orifice, then the height of orifice from the base is (Take g equals 10 straight m divided by sec squared )

  1. 80 cm
  2. 60 cm
  3. 40 cm
  4. 20 cm

The correct answer is: 60 cm


    table attributes columnalign left columnspacing 1em rowspacing 4 pt end attributes row cell t equals A over a square root of fraction numerator 2 h over denominator g end fraction end root end cell row cell 20 equals 100 square root of fraction numerator 2 h over denominator 10 end fraction end root end cell row cell h equals 0 times 2 m equals 20 cm semicolon H minus h equals 80 cm end cell end table

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