To calculate the time it will take for Chao to complete the journey, you can use the formula:

$\text{Time} = \frac{\text{Distance}}{\text{Speed}}$

Given:

• Distance = 336 miles
• Speed = 48 mph

Substitute these values into the formula:

$\text{Time} = \frac{336}{48} = 7 \, \text{hours}$

So, the journey will take Chao 7 hours.

Would you like more details or have any questions?

Here are 5 related questions to explore further:

1. How would the time change if the speed increased to 60 mph?
2. How would the time change if the distance increased to 400 miles?
3. If Chao only drove for 4 hours, how far would he have traveled at 48 mph?
4. What is the time difference between driving at 48 mph and 60 mph for the same distance?
5. How can you calculate the time for a journey when the speed is given in kilometers per hour instead of miles per hour?

Tip: Always make sure the units for distance and speed match before calculating time.