Question

If x and y vary inversly and x=4 when y=12find y when x = 8

Answer 1

Since x varies inversely with y, we can say that

x ∝ $\frac{1}{y}$

xy = constant

but x = 4 when y = 12

So constant = 4×12

constant = 48

hence xy = 48

Hence when x = 8, y = $\frac{48}{8}$

y = 6

HOPE IT HELPS !!