Question

if y is directly proportional to 1/X and X =2 when y = 20, what is the value of X when y =1.25?​

Answer 1

Answer:

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Answer 2

Since, y is directly proportional to 1/x

y = k*1/x (where k is constant of proportionality)

so,

For x = 2 and y = 20

=> k = xy

=> k = 2*20

=> k = 40. -----(1)

Now, for y = 1.25

=> k = xy

=> k = x*1.25

=> k = 1.25x. -------(2)

from equation (1) & (2)

=> 40 = 1.25x

=> 40/1.25 = x

Therefore, x = 32 (answer)

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