Answer:
Train A's unit rate is 70 km per hour.
Train B's unit rate is 75 km per hour.
Train B is faster.
Step-by-step explanation:
Train A:
Distance traveled by train A is given as,
Where, is time in hours and
is distance in kilometers.
Unit rate for train A is the distance traveled by it in 1 hour.
For t hours, distance traveled by train A =
∴ For, 1 hour, distance traveled by train A = km per hour.
Therefore, unit rate for train A is 70 km/h.
Train B:
From the table,
Distance traveled in 2 hours = 150 km
∴ Distance traveled in 1 hour = km per hour.
Therefore, unit rate for train B is 75 km/h.
Speed is distance traveled per unit time.
Therefore, unit rate is nothing but speed of train.
As unit rate of train B is greater than that of train A, speed of train B is greater and thus faster.