word problems and math

Question

The Kims want to visit relatives who live 800 miles from their home. If a thirty minute stop will be taken for lunch, and the average speed will be 70 miles per hour, about how long will the trip take?

Answer 1

First you should figure out how long it will take them to travel 800 miles nonstop at 70 mph.

To do that, divide 800 mi/70 mph giving 11.43 hours (rounded to 2 decimals).

If lunch takes 30 minutes, which equals 0.5 hour, then add that to 11.43 to get final answer

11.93 hours, which is just under 11 hours and 56 minutes.