Final answer:
The volume of one candle is 200cm³.
Step-by-step explanation:
To find the volume of the candle, we need to find the area of the base and multiply it by the height. Since the base is in the shape of a cuboid, the perimeter would be the sum of all its sides. In this case, the perimeter is given as 20cm, so each side of the base is 20cm/4 = 5cm. The area of the base is length x width, which is 5cm x 5cm = 25cm². Now we can find the volume by multiplying the area of the base by the height, which is 25cm² x 8cm = 200cm³. Therefore, the volume of one candle is 200cm³.