Question

X varies inversely as y when X is 15 then why is 10 if x is 20 then Y =?

Answer 1

X = 15. Y = 10
X = 20. Y = x
They are inversely proportional. So 15*20 = 10x
300/10 = x , x = 30 . Here's your ans buddy. Hope it helps you.

Answer 2

Correct Question :

x varies inversely as y when x is 15 then y = 10 if x is 20 then Y =?

Solution :

( In the attachment )

Extra :

Inverse variation :

The statement " x is inversely proportional to y" can also be expressed as "there is inverse variation in x and y". If x and y are in inverse proportion , x × y is constant .

Assuming the constant to be k , it is easy to solve a problem.

If x varies inversely as y then x × y is constant .

'x inversely varies as y'

Can also be written as :

$x \: \: \alpha \: \: \frac{1}{y}$

If ,

$x \: \: \alpha \: \: \frac{1}{y} \: \\ so \: \: x = \frac{k}{y} \: \: \: or \: x \times \: y = \: k \:$

This , is the equation of variation

Note: K is the constant of variation