alleryA train's length? I: It crosses a pole in 10 s. II: Its speed is 36 km/h.
AI alone suffices
BII alone suffices
CNeither, even together
DBoth together needed
Answer & Solution
Correct answer: D. Both together needed
Speed 36 km/h is 10 m/s and the pole is crossed in 10 s, so length is 100 m using both.
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