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## To calculate the total voltage developed by the battery, you need to multiply the number of cells by the voltage developed by each cell. In this case, there are five cells connected in series, and the voltage developed by each cell is 1.5 volts.

So, you can calculate the total voltage by multiplying 5 (number of cells) by 1.5 (voltage developed by each cell):

5 x 1.5 = 7.5 volts

Therefore, the total voltage developed by the battery is 7.5 volts.