Answer:
See below.
Step-by-step explanation:

Divide 400 by 25. You get 16. Multiply 16 by 8. You get 128.
18 bags of sand will be needed
Multiply the car by 2: 300 meters x 2 = 600 meters
30 seconds x 2 = 60 seconds.
The car also traveled 600 meters in 60 seconds, so the speed of the vehicles are the same.
No vehicle was faster.
Answer:
does not terminate
Step-by-step explanation: