Q42 / 52 · NTA Abhyas (NEET) 2020 · Physics · Mechanical Properties of Solids

A hole is made at the bottom of the tank filled with water (density = 1000 kg/m3). If the excess pressure at the bottom of the tank is three atmospheres (1 atmosphere =105 N/m2), then the velocity of efflux is

  • A
    400  m/s
  • B
    200  m/s
  • Correct answer
    C
    600  m/s
  • D
    500  m/s

Solution

The excess pressure at the bottom of the tank, p=ρgh=3 atm =3×105 N/m2

So, the height of the liquid in container

h=3×10510×103=30010

Now, velocity of efflux = 2gh= 2×10×30010

= 600  m/s

Hence, the correct answer is option: 'C'.

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