Question

a family leaves and 9 A.M. At that point the car's odometer reads 31,247. They drive until 12.30 P.M., when they stop for lunch. At the restaurant, the odometer reads 31,492. What is the unit rate of speed in miles per hour?

Answer 1

55.71 miles per hour or approximately 56 miles per hour

Explanation:

Here, we want to calculate the unit rate of the speed in miles per hour.

The odometer is the device that measures distance. Now to calculate the distance covered by the car, we need to subtract what we had initially from the final reading, this will give us the number of miles traveled by the car during the trip.

Mathematically = 31,492 - 31,247 = 195 miles

next is to calculate the time taken to travel this distance

that would be 12.30 pm - 9am = 3 hrs 30 minutes or simply 3.5 hours

The unit rate of the speed is thus; 195/3.5 = 55.71 miles per hour