A．At least 14 miles an hour.B．At least 40 miles an hour.C．At most 40 miles an hour.D．A
A: At least 14 miles an hour.
B: At least 40 miles an hour.
C: At most 40 miles an hour.
D: At most 14 miles an hour.
A: At least 14 miles an hour.
B: At least 40 miles an hour.
C: At most 40 miles an hour.
D: At most 14 miles an hour.
举一反三
- The train is running fifty miles ______ hour
- It reached a speed of forty miles an hour. It ________ forty miles an hour.
- The time it took car P to travel 600 miles was 2 hours less than the time it took car R to travel the same distance. If car P’s average speed was 10 miles per hour greater than that of car R, what was car R’s average speed, in miles per hour ？（） A: 40 B: 50 C: 60 D: 70 E: 80
- It reached a speed of forty miles an hour. It ______ forty miles an hour. A: ran B: ran with C: went at D: drove with
- A hiker walked for 3 days. She walked 18 miles on the first day, walking 3 miles per hour. On the second day she walked for one less hour, but she walked one mile per hour faster than on the first day. On the third day she walked the same number of hours as on the first day but at the same speed as on the second day. How many miles in total did she walk ？（） A: 24 B: 44 C: 58 D: 60 E: 62