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A particle of mass 100g is projected at ...

A particle of mass `100g` is projected at time `t=0` with a speed `20ms^(-1)` at an angle `45^(@)` to the horizontal as given in the figure.The magnitude of the angular momentum of the particle about the starting point at time `t=2s` us found to be `sqrt(k) kg m^(2)//s`.The value of `K` is_____ (Take `g=10ms^(-2)` )`

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