
Nech� roste podle vzore�ku $(3-t) \sqrt {t}$, $t \in [0,1]$, $t$ jeden rok.
Tr�vy naroste v�ce p�i �ast�j��m sp�s�n�.

$$
2\,\int _{0}^{1/2}\!\left (3-t\right )\sqrt {t}{dt}
={\frac {9\,\sqrt {2}}{10}}
$$

$$
3\,\int _{0}^{1/3}\!\left (3-t\right )\sqrt {t}{dt}
={\frac {28\,\sqrt {3}}{45}}
$$

Je lep�� sp�sat t�ikr�t.
