Abdil
Abdil Abdil
  • 02-05-2019
  • Mathematics
contestada

If p varies directly as r and p=4,r=2,what the value of r when p=12

Respuesta :

jimrgrant1 jimrgrant1
  • 02-05-2019

Answer:

r = 6

Step-by-step explanation:

Given that p varies directly as r, then the equation relating them is

p = kr ← k is the constant of variation

To find k use the condition p = 4, r = 2

k = [tex]\frac{p}{r}[/tex] = [tex]\frac{4}{2}[/tex] = 2

p = 2r ← equation of variation

When p = 12

12 = 2r ( divide both sides by 2 )

hence r = 6

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