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An explosion blows a rock into three pie...

An explosion blows a rock into three pieces Two pieces whose masses are 200 kg and 100 kg go off at `90^(@)` to eachother with a velocity of `8 m//s ` and ` 12 m//s ` respectively If the third piece flies off with a velocity of` 25 m//s` then calculate the mass of this piece and indicate the direction of flight of this piece in a diagram.

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