Question

Question 78 (ii)

If a and b vary inversely to each other, then find the values of x,y,z

Answer 1

It a and b are vary inversely to each other

If $a=6andb=15$
Then, $a\times b=6\times 15=90\Rightarrow k=90$
When $a=2andb=x$ then
$ab=k\Rightarrow 2\times x=90\Rightarrow x=45$
When $a=yandb=12.5,$ then
$ab=k\Rightarrow y\times 12.5=90\Rightarrow y=\frac{90}{12.5}=7.2$
When$a=10andy=z,$ then
$ab=k\Rightarrow 10\times z=90\Rightarrow z=9$