Final answer:
The typical width of the severe weather band with a cold front is around 100 miles, and it moves at an average speed of 20 knots.
Step-by-step explanation:
The typical width of the severe weather band with a cold front can vary, but it is generally around 100 miles. The average speed of a cold front is typically around 20 knots.
For example, let's say there is a cold front moving through an area. The severe weather associated with the cold front may extend about 100 miles in width, impacting a large area. This severe weather band will then move at an average speed of about 20 knots, which is equivalent to approximately 23 miles per hour.