Answer:it will be approximately 32.438 hours before the two groups can expect to meet.
Step-by-step explanation:To find out how long it will be before the two groups of tourists meet, you can use the formula:
Time = Distance / Speed
Let's calculate the time it takes for each group to travel towards each other:
For the group traveling from the western end at 38 miles per hour:
Time1 = Distance / Speed = 688 miles / 38 mph = 18.105 hours (approximately)
For the group traveling from the eastern end at 48 miles per hour:
Time2 = Distance / Speed = 688 miles / 48 mph = 14.333 hours (approximately)
Now, since both groups are traveling towards each other, you can add the times it takes for each group to meet:
Total Time = Time1 + Time2 = 18.105 hours + 14.333 hours ≈ 32.438 hours
So, it will be approximately 32.438 hours before the two groups can expect to meet.