1.

A train travels 40 km at a uniform speed of 30kmh−1. Its average speed for the whole journey after travelling another 40 km is 45kmh−1. Its speed in the second half of the journey is ____.

Answer»

A train travels 40 km at a uniform speed of 30kmh1. Its average speed for the whole journey after travelling another 40 km is 45kmh1. Its speed in the second half of the journey is ____.





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