A train travels 253 km at an average speed of 92 km/hr then 45 km at an average speed of 10 m/s. Find the average speed for the whole journey in km/hr.
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A train travels 253 km at an average speed of 92 km/hr then 45 km at
an average speed of 10 m/s. Find the average speed for the whole
journey in km/hr.
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