Question

Question #d27b1

Answer 1

Z varies directly as x and inversely as y.

So `zpropx/y=>z=kx/y`,where k is variation constant.

Now `z=123 when x=6 and y=6`

So `123=kxx6/6=>k=123`

So when `x=7 and y=8` then z becomes
`z=123xx7/8=861/8`