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Q.

Is it true that the speed of a train is expressed in km/h?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
There are different types of units for measuring motion, like m/sec, km/h, miles/hour, and cm/sec. But the selection of these units is based on the speed ranges of the object. For example, dust particles’ motion in sedimentation is measured in cm/sec or cm/min. Because the range of speed of particles is very small. The speed of the escalator and elevator is measured in m/sec. On the other hand, the speed of a train is very fast, which means it covers more distance in less time and is expressed in km/hr.
 
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