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The answer to each of the questions is a single digit integer ranging from 0 to 9. In a certain system of units, 1 unit of time is 5 sec, 1 unit of mass is 20 kg and 1 unit of length is 10m. If in this system one unit of power will correspond to 1/(A)^2 watt*. Find A.



The answer to each of the questions is a single digit integer ranging from 0 to 9.


 


In a certain system of units, 1 unit of time is 5 sec, 1 unit of mass is 20 kg and 1 unit of length is 10m. If in this system one unit of power will correspond to 1/(A)^2  watt*. Find A.


 

Grade:10

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

4

 

        1 sec* = 5 sec, 1kg* = 20 kg, 1m* = 10m

 

        1 watt = 1kg m2 sec–3

 

        =  kg*

 

         kg* m*2 sec*–3 =  watt*

 

        =  watt*         \ A = 4.

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