A train travels between two stations a and b 135 km apart in 5 hours. if on the return journey the average speed is reduced by 2 km/hr, what is the average speed during the journey from a to b and b to a?
A train travels between two stations a and b 135 km apart in 5 hours. if on the return journey the average speed is reduced by 2 km/hr, what is the average speed during the journey from a to b and b to a?
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Time taken=5hrs
Therefore,
Speed between a to b=135/5=27Km/hrs
Since,
Speed between b to a=27-2=25km/hrs(Given)
& time betwen b to a=135/25=5.4hrs
Since,
Total distace=(135+135)Km,
Average speed=Total distace/total time
Therefore,
Average speed=(135+135)/5+5.4=25.96km/hrs
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