A vehicle having speed 48km/hr and completes that journey in 3 hours. The speed required to complete that journey in 2 hours 40 minutes is a) 54km/hr b) 60km/h c) 39km/h d) 50km/hr
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a54 it is not certain as I don't know the amswer
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d) 50km / hr...
hope it helped
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