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In a certain system of absolute units t...

In a certain system of absolute units the acceleration produced by gravity in a body falling freely is denoted by `4.9` ,the kinetic energy of a `20kg` shot moving with velocity `4` metres per second is denoted by `100` and its momentum by `10`. Then find unit of length (in meter). (acceleration due to gravity = 9.8,`m/s^(2))`

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