1.

Distance between Delhi and agra is 200 km A train travels first 100 kmat the speed of 50 km/hour how fast must the train travels by next 100 km so as the average speed 70 km/hour for whole journey.

Answer» AVERAGE SPEED=>>>
Vavg = 2v1v2/v1+v2
Vavg = 2× 70×50 /70+50 = 7000/120
Vavg. = 58.3 KM/ hour


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