Respuesta :
60 miles per hour x 4 hours = 240 miles
Mr smith was 240 miles ahead of Mrs/ smith
The difference in speeds was 80 - 60 = 20 miles per hour
240 miles / 20 miles per hour = 12 hours.
It takes 12 hours to catch up.
60 miles per hour x 4 hours = 240 miles
Mr smith was 240 miles ahead of Mrs/ smith
The difference in speeds was 80 - 60 = 20 miles per hour
240 miles / 20 miles per hour = 12 hours.
It takes 12 hours to catch up.