If x and y vary inversely as each other and

(i) x = 3 when y = 8, find y when x = 4


(ii) x = 5, when y = 15, find x when y = 12


(iii) x = 30, find y when constant of variation = 900


(iv) y = 35, find x when constant of variation = 7

(i) Let




3



4





8








Therefore y is 6


(ii) Let




5







15



12






Therefore x is


(iii) Let y is p


Constant of variation is 900





Therefore p is 30


(iv) Let x is p


Constant of variation is 7





Therefore x is


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