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In a new system of units, unit of mass i...

In a new system of units, unit of mass is taken as `10kg`,unit of length is `60m` and unit of time is `1` minute. The value of `20N` weight of a body in the new unit will be
(1) `20` unit
(2) 60 unit
(3)` 40` unit
(4) `120` unit

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