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प्रश्न
A train covers 51 km in 3 hours. Calculate its speed. How far does the train go in 30 minutes?
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उत्तर
Given: Distance = 51 km
Time = 3 hours
∴ Speed = `"Distance"/"Time"`
= `51/3`
= 17 km/h
Now,
Time = 30 minutes = `30/60` h = `1/2` h
Speed = 17 km/h
∴ Distance travelled = Speed × Time
= `17xx1/2`
= 8.5 km
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