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प्रश्न
A train travels 700 metres in 35 seconds. What is its speed in km/h?
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उत्तर
Distance = 700 m
Time taken = 35 sec
∴ Speed in m/sec = `"Distance"/"Time"`
= `700/35`
= 20 m/sec
and Speed in km/h = `(20xx60xx60)/1000`
= 72 km/h
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