Question

x alpha 1/y ,when x=15 then y=10 if x=20 then y=?​

Answer 1

Answer:

If x = 20, then y = 7.5

Step-by-step explanation:

x ∝ $\frac{1}{y}$ If k is the proportionality constant, then $x = \frac{k}{y}$  . . . . . . . . . . . equation (i)

When x = 15, then y = 10.  Putting the values in equation (i):

k = x times y = 15 . 10 = 150.

∴ if x = 20, then, $20 = \frac{k}{y}$  $=> y = \frac{k}{x} = \frac{150}{20} = 7.5$