Question

Question 78 (iii)

If a and b vary inversely to each other, then find the value of l,m,n.

Answer 1

If $a=6andb=10,$ then
$ab=6\times 10=60\Rightarrow k=60$
When $a=landb=5,$then
$ab=k\Rightarrow l\times 5=60\Rightarrow l=12$
When $a=9andb=m$ then
$ab=k\Rightarrow 9\times =60\Rightarrow m=\frac{20}{3}$
When $a=nandb=25,$ then
$ab=k\Rightarrow n\times 25=60\Rightarrow n=\frac{60}{25}\Rightarrow n=\frac{12}{5}$