Problem

- Three liquids A, B and C of specific heats

1 \text{ cal/g}^\circ\text{C}

0.5 \text{ cal/g}^\circ\text{C}

and

0.25 \text{ cal/g}^\circ\text{C}

are at temperatures

20^\circ\text{C}

40^\circ\text{C}

and

60^\circ\text{C}

respectively. Find temperature in equilibrium if they are mixed together. Their masses are equal.