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A particle covers equal distances in sam...

A particle covers equal distances in same direction on a linear path with different velocities `v _(1) , v_(2) and v _(3)` find the formula for its average speed.

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Average speed `= ( 3 v _(1) v _(2) v _(3)) .( v _(1) v _(2)+ v _(3) + v _(2) v _(3))`
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