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1999
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Q)
The K.E. of a person is just half of K.E. of a boy whose mass is just half of tha person. If person increases its speed by 1 m/s, then its K.E. equals to that of boy then initial speed of person was -
( A ) None
( B ) $(2+\sqrt{2})m/s$
( C ) $2(\sqrt{2}+2)m/s$
( D ) $(\sqrt{2}+1)m/s$
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