146489 Equal masses of three liquids $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ have temperatures $\quad 10^{\circ} \mathrm{C}, \quad 25^{\circ} \mathrm{C}$ and $40^{\circ} \mathrm{C}$ respectively. If $A$ and $B$ are mixed, the mixture has a temperature of $15^{\circ} \mathrm{C}$. If $B$ and $C$ are mixed, the mixture has a temperature of $30^{\circ} \mathrm{C}$. If $A$ and $C$ are mixed, the temperature of the mixture is
146489 Equal masses of three liquids $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ have temperatures $\quad 10^{\circ} \mathrm{C}, \quad 25^{\circ} \mathrm{C}$ and $40^{\circ} \mathrm{C}$ respectively. If $A$ and $B$ are mixed, the mixture has a temperature of $15^{\circ} \mathrm{C}$. If $B$ and $C$ are mixed, the mixture has a temperature of $30^{\circ} \mathrm{C}$. If $A$ and $C$ are mixed, the temperature of the mixture is
146489 Equal masses of three liquids $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ have temperatures $\quad 10^{\circ} \mathrm{C}, \quad 25^{\circ} \mathrm{C}$ and $40^{\circ} \mathrm{C}$ respectively. If $A$ and $B$ are mixed, the mixture has a temperature of $15^{\circ} \mathrm{C}$. If $B$ and $C$ are mixed, the mixture has a temperature of $30^{\circ} \mathrm{C}$. If $A$ and $C$ are mixed, the temperature of the mixture is
146489 Equal masses of three liquids $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ have temperatures $\quad 10^{\circ} \mathrm{C}, \quad 25^{\circ} \mathrm{C}$ and $40^{\circ} \mathrm{C}$ respectively. If $A$ and $B$ are mixed, the mixture has a temperature of $15^{\circ} \mathrm{C}$. If $B$ and $C$ are mixed, the mixture has a temperature of $30^{\circ} \mathrm{C}$. If $A$ and $C$ are mixed, the temperature of the mixture is
146489 Equal masses of three liquids $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ have temperatures $\quad 10^{\circ} \mathrm{C}, \quad 25^{\circ} \mathrm{C}$ and $40^{\circ} \mathrm{C}$ respectively. If $A$ and $B$ are mixed, the mixture has a temperature of $15^{\circ} \mathrm{C}$. If $B$ and $C$ are mixed, the mixture has a temperature of $30^{\circ} \mathrm{C}$. If $A$ and $C$ are mixed, the temperature of the mixture is