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A particle of mass 1 mg has the same wav...

A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of `3 xx 10^6 m s^(-1)`.If mass of the leectron is `9.1 xx 10^(-31)kg`,then the velocity of the particle is

A

`2.7 xx 10 ^(-18) m s^(-1)`

B

`2.7 xx 10 ^(-21) m s^(-1)`

C

`3.0 xx 10^(-31) ms ^(-1)`

D

`9.0 xx 10^(-12) m s^(-1)`

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