Question

Y varies directly with x. If y=75 when x=25. Find x when y=25

Answer 1

the answer will be 25/3,

Answer 2

Given :  Y varies directly with X

if Y = 75 then X = 25

To Find : X  when Y = 25

Solution:

Y varies directly with X

=> Y = KX

K is a constant of proportionality

if Y = 75 then X = 25

=> 75 = K (25)

=> 3 = K

=> K = 3

Hence

Y = 3X

Y = 25

=> 25 = 3X

=> 25/3 = X

=> X = 25/3

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