Ravi packed 12 boxes of sweets each weighing 200 grams. What is the total weight of sweets Ravi packed?

The correct option is D 2.4 kg
Weight of one box of sweets = 200 grams
Number of boxes = 12
Total weight of the sweets = 200 $\times$ 12 grams = 2400 grams

$\because 1000\text{grams}=1\text{kilogram}\therefore 1\text{gram}=\frac{1}{1000}\text{kg}\therefore 1\text{gram}=0.001\text{kg}\Rightarrow 2400\text{grams}=2400\times 0.001\text{kg}=2.4\text{kg}$
Thus, the total weight of sweets Ravi packed is 2.4 kilograms.