Question

If x and y vary inversely and x=15 when y=18, find the value of y when x=20. *

Answer 1

Answer:

Step-by-step explanation:

Since x and y vary inversely

x = k/y - - - - - - - - (1)

where k is constant

Now x=15 when y=18 gives

15 = k/18

k = 18×15

Now from equation (1)

For X = 20

20 = k/y

So

y = k /20 = 18×15 /20 = 270/20 = 27/2

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