A ball is thrown vertically upwards with a velocity of \(\SI[per-mode=symbol]{2}{\meter\per\second}.\) It is seen at height \(h\) twice.

Find the sum of the times, measured in seconds from the moment the ball is thrown, at which it is seen at height \(h\).

\(\)

**Details and Assumptions:**

- Take \(g=\SI[per-mode=symbol]{10}{\meter\per\second\squared}\).
- Neglect air resistance.

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