A parachutist after bailing out falls 50...

A parachutist after bailing out falls 50 m ,whitout friction. When the parachute opens he decelerates downwards at `2ms ^(-2)`. He reaches the ground with a speed of `3ms ^(-1)`. How long was the parachustintist in air ? At wht height did he ball out ?

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The correct Answer is:

17. 3 s 292 . 7 m

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