Question: The Llesis family drove and hiked 6 hours to their vacation spot. They drove an average of 50 miles per hour and hiked an average of 5 miles per hour less than half their speed when they drive. If it took them 1.5 hours to hike, how far was their vacation spot?
Give me a clear explanation. 
Answer: 
Half the average speed of Llesis family driving is 50/2 = 25 miles per hour.
Hence, their average speed hiking was 25 - 5 = 20 miles per hour.
So, they hiked 20 x 1.5 = 30 miles.
It took them a total of 6 - 1.5 = 4.5 hours driving.
So, they drove 50 x 4.5 = 225 miles.
Therefore, their vacation spot was 30 + 225 = 255 miles far.