Question

if x varies inversely as the cube of y when the y= 5 and the value of x= 81. what will be the value of y when X=3​

Answer 1

y×1/x

to make the variation sign to equal to we introduced a constant k.

y=k/x³

k=y×x³ and when y=5,x=81

81³=9

k=5×9=45

y=k/x [y=45/x] this is the relationship between y and x.x=3

x=45/3=15.

hope it will help us.....

Answer 2

Step-by-step explanation:

if x varies inversely as the cube of y when the y= 5 and the value of x= 81. what will be the value of y when X=3