Question

PLEASE HELP DUE SOON

Answer 1

Train A's unit rate is 70 km per hour.

Train B's unit rate is 75 km per hour.

Train B is faster.

Explanation:

Train A:

Distance traveled by train A is given as,
`d=70t`

Where,
`t` is time in hours and
`d` 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 =
`70t`

∴ For, 1 hour, distance traveled by train A =
`(70t)/(t)=70` 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 =
`(150)/(2)=75` 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.