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A bus travels 54 km in 90 minutes. The speed of the bus is
$(a)$. 0.6 m/s
$(b)$. 10 m/s
$(c)$. 5.4 m/s
$(d)$. 3.6 m/s
Distance traveled by the bus $=54\ km=54\times1000\ m=54000\ m$
Time taken to travel $=90\ minute=90\times60\ s=5400\ s$
Therefore, the speed of the bus $=\frac{54000\ m}{5400\ s}=10\ m/s$
So, option $(b)$ is correct.
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