Question

If q is inversely proportional to r squared and q=30 when r=3, find r when q=1.2

Answer 1

Answer:

r = 3

Step-by-step explanation:

q = k / $r^{2}$

k = q$r^{2}$ = 1.2 x 3 x 3 = 10.8

q = 10.8/$r^{2}$

1.2 = 10.8/$r^{2}$

r = $\sqrt{10.8 /1.2}$ = 3