Leah weigh herself on the bathroom scales. She weighed 311/2 kg. When she dropped her wet towel on the floor, her actual mass was 28 kg. What was the weight of the wet towel in kg and g?

To find the weight of the wet towel, we need to subtract Leah's actual mass from her weight on the bathroom scales.

Weight of the wet towel = Weight on bathroom scales - Actual mass
Weight of the wet towel = 31.5 kg - 28 kg
Weight of the wet towel = 3.5 kg

To convert 3.5 kg to grams, we multiply by 1000:
3.5 kg * 1000 = 3500 g

Therefore, the weight of the wet towel is 3.5 kg or 3500 g.

Step 1: Convert Leah's weight from kg to g

311/2 kg = 31.5 kg
31.5 kg = 31,500 g

Step 2: Calculate the weight of the wet towel

Weight of wet towel = Weight of Leah with towel - Weight of Leah without towel
Weight of wet towel = 31,500 g - 28,000 g
Weight of wet towel = 3,500 g

Therefore, the weight of the wet towel is 3,500 grams or 3.5 kg.