Sunday, 19 November 2017

VARIATIONS-1


x is inversely proportional to y. x=12 while y=5. Find y when x is 3.

Solution

x k
      y

x = k
      y

12 = k
        5

k = 12 x 5

k = 60

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

k = 60, y= ?, x = 3.

x = k
      y

3 = 60
       y

y x 3 = 60  x  y   (multiply by y on both sides)
                y
  
3y = 60
3      3

y = 20  .


TRY THIS…………….


x is inversely proportional to y. x=20 while y=4. Find y when x is 2.

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