Why would you throw like that?

Standing on a building \(80\text{m}\) high, I threw a stone vertically upwards at a velocity of \(20\text{m/s}\). Then find the time(in seconds) it takes to reach the ground.


Details and assumption:-

  • Take \(\text{g}\)(acceleration due to gravity) as \(10{\text{m/s}}^2\).
  • Give your answer to two decimal places.
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