Question 10199
The variables x and y vary directly means they change in such a way
that the ratio {{{y/x}}} is constant.  Here, x=2 and y=6;
So {{{y/x}}} = {{{6/2}}} = {{{3/1}}}
If x = 10, then {{{y/10}}} = {{{3/1}}} = {{{30/10}}}  
so y = 30  Answer

   

{{{y/x}}}={{{(3 * 10)/(1*10)}}} = {{{30/10}}}

So y = 30 Answer

gsm