A train rolls past a stationary observer. To him, the train is moving at a speed of 23 m/s west, and a woman on the train is moving at a speed of 22.4 m/s west. How long does it take the woman to move 13 m relative to the train?

A. 25.6 s
B. 24.1 s
C. 21.7 s
D. 23.2 s

Question

A train rolls past a stationary observer. To him, the train is moving at a speed of 23 m/s west, and a woman on the train is moving at a speed of 22.4 m/s west. How long does it take the woman to move 13 m relative to the train?

 		A.	25.6 s
 		B.	24.1 s
 		C.	21.7 s
 		D.	23.2 s

anonymous · Answer

Relative to the train, the speed of the woman is (23-22.4)m/s . So then how long will it take her to cover a distance of 13m ?