13. Five marks exercise problems XI

The price of an item $x$ increases by $₹10$ every year and an item $y$ decreases by $₹15$ every year. If in $2018$, the price of $x$ is $₹50$ and $y$ is $₹90$, then which item will be costlier in the year $2020$.

 

The price of $x$ in $2020$ $=$ $₹$

 

The price of $y$ in $2020$ $=$ $₹$

 

Costlier item $=$ xy