Question

When Lyn walks from home to school at a speed of 3 mph, it takes her 25 minutes. How long will it take her if she runs at a speed of 5 mph?

Answer 1

1.44 miles per hour, here you have to convert the time into hours and then divide the speed by the time to get distance.  Once you have distance, you merely have to divide it by the speed in question, and you will have the time in hours.