Question

A delivery truck drove 203 mi in 3.5 h. After unloading and loading new cargo, it traveled on another 243 mi for 4.5 h. What was the average speed of the truck over its entire route? Round to the nearest hundredth, if necessary.
1. 55.75 mi/h
2. 56.00 mi/h
3. 58.00 mi/h                               PLZ HURRY!!
4. 63.70 mi/h

Answer 1

The average speed of the truck is calculated by dividing the total distance traveled in a span of the total time given. From the given above, the total distance traveled is
                       total distance = 203 mi + 243 mi = 446 mi
and the total time it took for the whole trip is
                       total time = 3.5 h + 4.5 h = 8 h
The average speed is therefore,
                       average speed = 446 mi/8 h = 55.75 mi/h
Thus, the answer is letter A.