Question

A train moves east with a speed of 45 m/s. A man on the train walks west
with a speed of 0.4 m/s relative to the train. How long does it take the man to
move 10 m relative to the train?

A. 0.22 S
B. 12 s
C. 32 S
D. 25 s

Answer 1

Answer: D. 25s

Explanation:

speed = distance travelled/time taken

Or:

v = $\frac{s}{t}$

∴ t = $\frac{s}{v}$ = $\frac{10}{0.4}$ = 25s

Therefor, the answer is 25s or D.

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