alleryA man walks forward at 10 km/h inside a train moving at 40 km/h. How fast is he moving relative to the ground?
A45 km/h
B40 km/h
C30 km/h
D50 km/h
Answer & Solution
Correct answer: D. 50 km/h
In the same direction the speeds add, 40 + 10 = 50 km/h.
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