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A ball of mass 3 kg is thrown upwards wi...

A ball of mass 3 kg is thrown upwards with velocity 20 m/s. After 1 s it explodes in 2 pieces one of mass 1 kg and other or 2 kg. After explosion both the pices maintain their vertical velocities but on ground they fall 90 m aport.
Speed of both the pieces just after explosion are (both in m/s)

A

`10sqrt5,10sqrt2`

B

30, 20

C

`20sqrt3,10sqrt3`

D

`20sqrt2,20`

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