To travel 648 km, an Express train takes 12 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 6 hours less thanRajdhani. The speed of Rajdhani is _____.

To travel 648 km, an Express train takes 12 hours more than Rajdhani. If however, the speed of the Express train is doubled, it takes 6 hours less thanRajdhani. The speed of Rajdhani is _____. Correct Answer 27 km\/hr

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