In a view unit system, 1 unit of time is...

In a view unit system, 1 unit of time is equal to 10 second, 1 unit of mass is `5 kg` and 1 unit of length is `20 m`. In the new system of units 1 unit of energy is equal to :

20 joule

`(1)/(20)` joule

4 joule

16 joule

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