Saturday 24 December 2016

VARIATIONS 2

x is directly proportional to y. x=12 while y=4. Find y when x is 240.

Solution

x y

x = ky

12 = k x 4

12 = 4k
4      4

k = 3
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

k = 3, y= ? x = 240.

x = ky

240 = 3 x y

240 = 3y
 3       3

y = 80.

TRY THIS…………….


x is directly proportional to y. x=20 while y=8. Find y when x is 200.

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