- A111.6 km/h
- B104.4 km/h
- C90 km/h
- D108 km/h
Step-by-Step Solution
From pole 1 to pole 31 there are 30 gaps m in 60 s → 30 m/s km/h. (111.6 counts 31 gaps.)
Answer: D) 108 km/h
Telegraph poles beside a line are 60 m apart. A passenger notices that the train passes from the 1st pole to the 31st pole in exactly 1 minute. What is the train's speed?
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