Answer
22 lb
Step-by-step explanation
Given that 1 bag weighs 2.5 kg, then 4 bags will weigh:
[tex]4\times2.5\text{ kg}=10\text{ kg}[/tex]Using the conversion factor: 1 kg = 2.2 lb, 10 kg are equivalent to:
[tex]10\text{ kg}=10\text{ kg}\times\frac{2.2\text{ lb}}{1\text{ kg}}=22\text{ lb}[/tex]