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A train travels $100\ m$ long moving on a straight level track passes a pole in $5\s$. Find the speed of the train.
Here, the distance traveled by train will be the length of the train.
Therefore, distance traveled $s=100\ m$
Time $t=5\ s$
Therefore, speed of the train $=\frac{distance}{time}=\frac{s}{t}$
$=\frac{100}{5}$
$=20\ m/s$
Thus, the speed of the train is $20\ m/s$.
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