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A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m\ s^{-2}, with

(I) What velocity will it strike the ground?

(II) After what time will it strike the ground?
 
From the Equation of motion - I, We know that,
 
i=i+i×i
 
From the Equation of motion - III, We know that,
 
i×i×i  =ii  ii
  
Velocity =  m\ s^{-1}
 
Time=  s
 
(Note: Enter your answers with two decimal places)