Asked by Amy

If w varies directly as r and inversely as the square of p, if w= 25 when r=5 and p=4, find r when w=16 and p=8
Answered by Damon
w = k r/p^2

25 = k (5)/16
k = 5*16 = 80
so

w = 80 r/p^2

16 = 80 r/64

r = 16*64/80 = 12.8
Answered by Amy
Thank You!!
Answered by Damon
You are welcome :)
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