Question

X and Y are varies inversely proportional, X=5, when Y = 15, find X when Y = 12ý​

Answer 1

Answer:

y = 12(15)

∴ x = 12(5) = 60

Answer 2

It is given that, x and y vary inversely.

∴ xy = k

For x = 5 and y = 15 we have:

⇒ 5×15 = k

⇒ k = 75

For y = 12,

⇒ 12x = 75

$x = \frac{75}{12} \\ \\ x = \frac{25}{4}$