1. M. V. Lomonosov spent one coin on bread and kvass. When prices increased by $20 \%$, he could buy half a loaf of bread and kvass with that same coin. Would that same coin be enough to buy at least kvass if prices rise by another $20 \%$?
1. Let the price of bread be $x$, and the price of kvass be $y$ (before the price increase). Then, according to the condition: money $=x+y$. After the price increase, bread costs $1.2 x$, and kvass costs $1.2 y$. Therefore,

$$
\text { money }=0.5 \text { bread }+ \text { kvass }=0.6 x+1.2 y .
$$

From these equations, we get:

$$
x+y=0.6 x+1.2 y
$$

Simplifying, we obtain $2 x=y$.

Express the money in terms of $y$:

$$
\text { money }=x+y=1.5 y \text {. }
$$

After the second price increase, kvass costs $1.2 \cdot 1.2 y=$ $=1.44 y$. Since $1.5 y>1.44 y$, the money will be enough for the kvass.