In a new 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 this new system of units, 1 unit of energy is equal to

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New unit 1 UT = 10 sec 1 UM = 5 kg 1 UL = 20 m 1 UE = ( 1 UM ) ( 1 UT 1 UL ​ ) 2 = 10 × 10 5 × 20 × 20 ​ ⇒ 20 J

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