a) 150 m/sec
b) 200 m/sec
c) 20 km/h
d) 72 km/h
Answer: d
Explanation: Speed of train
= $$\frac{{{\text{length of the train}} + {\text{length of platform}}}}{{{\text{Time}}}}$$
= $$\frac{{250 + 250}}{{25}}$$
= 20 m/sec
= 72 km/h
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