The number of revolutions of a current meter in 50 seconds were found to be 12 and 30 corresponding to the velocities of 0.25 and 0.46 m/sec. respectively. What velocity (in m/sec.) would be indicated by 50 revolutions of the current meter in one minute ?

- 1
  
  0.42
- 2
  
  0.50
- 3
  
  0.60
- 4
  
  0.73

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