Carly says she walks 300 millimeters to school each day. is it reasonable. explain

The statement is not reasonable.

Step-by-step explanation:

First, 1 millimeter is equivalent to a (1/1000) meters = 0.001 meters

so if Carly says that she walks 300 millimeters, she is walking:

300*0.001 meters = 0.3 meters

This would mean that she lives at a distance of less than half a meter of the school, which has no sense, so the statement is not reasonable.