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If and when , ____ is the constant of variation .

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Detailed Solution

Concept- Here, 63 is the constant of variation. We'll enter the variable’s current values into the equation that was created after the inversely proportional sign was eliminated.
Given

Let the constant of variation introduced be

after removing the proportionality sign.

Also given that when

, the corresponding value of

.
Put

and

in equation (1), we get

Therefore, the required value of the constant of variation

is 63 .
Hence, the correct answer is 63.

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