Question

Frederica is sitting on a moving train. She watches the telephone poles fly past. She knows that the poles in this area are 1/4 mile apart. Every minute, 5 poles pass her. In the reference frame of the poles, how fast is the train moving?

A.
2 miles/min
B.
1.3 miles/min
C.
0.80 miles/min
D.
0.50 miles/min

Answer 1

B
1 mile=4 poles
if 5 poles pass by than she´s going around 1.25 miles per min
rounded up = 1.3 mil/min