Will Water will melt faster on a very cold soft drink than it cool drink?

No.

The rate of melting of ice is primarily determined by the temperature and surface area exposed to the heat source. In this case, the temperature of the cold drink is the same as that of the cool drink. Both drinks will provide the same amount of heat energy to the ice placed on their surfaces, causing them to melt at the same rate.

However, if you consider the volume of the ice cube, it might melt slightly faster in the cold drink compared to the cool drink due to the higher temperature difference between the ice and the cold drink. But this difference would be very small and negligible.

Therefore, the melting rate of ice is primarily determined by the temperature and surface area exposed to the heat source, and not by the coldness or coolness of the drink.