Practice!

Sample Problem

A train travels at a speed of 89.4 miles per hour from 10:00 am to 8:00 pm. It travels at a speed of 102.5 miles per hour from 8:00 pm to 10: 00 am. How many miles can the train travel if it travels from 8:00 am August 10th to 9 am August 11th?

miles

Solution

From 8:00 am August 10th to 9 am August 11th, The train travels 25 hours in total.

The number of hours between 10:00 am to 8:00 pm: 10

So, the number of hours between 8:00 pm to 10:00 am: 15

Thus, the total distance: 89.4 × 10 + 102.5 × 15 = 894 + 1537.5 = 2431.5 miles