Q. 633.7( 3 Votes )

If x varies inversely as y and x = 20 when y = 600, find y when x = 400.

Answer :

If x varies inversely as y.


xy = k(constant) …(i)


If x = 20 and y = 600


xy = 20× 600 = 12000


k = 12000


When x = 400, then from Eq. (i)


y× 400 = k


y × 400 = 12000



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