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An object starting from rest travels \(20\ m\) in first \(2\ s\) and \(160\ m\) in next \(4\ s\). What will be the velocity after \(7\ s\) from the start.
 
From the Equation of motion - \(II\), We know that,
 
i=i×i+ii×i×ii
 
From the Equation of motion - \(I\), We know that,
 
i=i+i×i
  
Acceleration in First \(2\ s\) \(=\)  \(m\ s^{-2}\)
 
Acceleration in next \(4\ s\) \(=\)  \(m\ s^{-2}\)
  
Velocity after \(7\ s\) from start \(=\)   \(m\ s^{-2}\)
 
(Note: Enter your answers with no decimal places)